PDF malware analysis — malicious · 1b0b1efe3a499c12

MALICIOUS

PDF

82.7 KB Created: 2021-08-17 12:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 212edd199015d668eaebc2ed0b141e9c SHA-1: 2c4591891b959c224a0fb4d5c5d6fd3bf0513e56 SHA-256: 1b0b1efe3a499c1263031a4cfab876b7a26008caf6e047e19b4b5fc6a02938d6

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content. The presence of a 'download button' lure and a callback phishing pretext further supports a malicious intent to deceive users into downloading or interacting with harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

Heuristics 8

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://archism.ru/uplcv?utm_term=downgrade+android+9+to+8+huawei+p+smart PDF link annotation
- http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nurexawas.pdfIn PDF document text
- https://habibitours.org/ckfinder/userfiles/files/25289915260.pdfIn PDF document text
- https://tdfstore.it/file/bedume.pdfIn PDF document text
- https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607f366111c29---fisazimuwajekaturumuve.pdfIn PDF document text
- http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b33a5815ae0---sedofukolakupexu.pdfIn PDF document text
- http://aksaaydinlatma.com/img/editor/image/file/rajaxoz.pdfIn PDF document text
- http://chhattisgarhsanskritboard.in/sharpinstitute/images/files/jurubolomerewo.pdfIn PDF document text
- https://chameleoncoupons.com/adgprocessing/uploads/files/tazasisadisogiv.pdfIn PDF document text
- http://geoass.eu/userfiles/files/vizazu.pdfIn PDF document text
- https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/32f88735ab668dfc26c147e3a33a091b/radit.pdfIn PDF document text
- http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c78961c276---92485732109.pdfIn PDF document text
- http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e79c659c1---55219426384.pdfIn PDF document text
- https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/5oqq7uusg134ngn28mfdi4os5f/musete.pdfIn PDF document text
- https://uangraja.com/contents//files/rexipiverokesopivam.pdfIn PDF document text
- https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160f1b6db63b7e---30717203743.pdfIn PDF document text
- https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160d404e24f58e---80899156318.pdfIn PDF document text
- http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/db625720d365ed868fe1f2dae765baa1/44376531392.pdfIn PDF document text
- https://mr-alian.com/upload/ckfinder/files/vinujuzekupowuxidirurewub.pdfIn PDF document text
- http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f174c22dae---31598285456.pdfIn PDF document text
- https://marblobath.com/app/webroot/img/files/pusaxeseb.pdfIn PDF document text
- https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adeeb55d868---24525056177.pdfIn PDF document text
- https://diphong.com/uploads/tipaxenixejazadabas.pdfIn PDF document text
- https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/42058090354.pdfIn PDF document text
- https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d433dde78a---dukenedugan.pdfIn PDF document text
- https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/8f0336ccefde2b2b6129af2447814439/dawozukopexutar.pdfIn PDF document text
- https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/4accc542449bb40ac6c5277b5697249f/mizisobozomajedu.pdfIn PDF document text
- https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fecf5246e---94784299452.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dbfd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBFD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f40f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF40F	17552 bytes
SHA-256: `5b6c6476485078961ad8e132b31070357eebf6709facf965967c313f53942187`
`font_02_sfnt_off000122ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x122AD	11356 bytes
SHA-256: `297b8820a25c7a49fc17d8fbdbd4978e796842205332398ddf7fcb3c18a742d8`

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