PDF malware analysis — malicious · 3e9040c0c436b3de

MALICIOUS

PDF

97.5 KB Created: 2021-06-30 13:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: a6e1e714f29d63889783c182f2257cb0 SHA-1: 8fae9e929f2a3694cfc3998e28f0749f3df1937c SHA-256: 3e9040c0c436b3de431a85e79b386086409fd25479eaf9f76ffc82040e6a95b3

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to compromised WordPress upload storage, suggesting it is used to host malicious files. The document's structure and heuristic firings indicate it is designed as a callback phishing lure, prompting users to call a number for a fabricated issue.

Machine Learning

Nyx PDF Classifier malicious score 0.9905

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
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://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081eea68742c---xawowadofamiwev.pdf In PDF document text
- https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/49522085fb3ed39106f0b23a79cc4c60/80738485547.pdfIn PDF document text
- https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/a81aaa3f9f37e08c1c6fb67a419bfb38/39336197226.pdfIn PDF document text
- https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/3eqmbsk32of7civtg2s1lm16a0/36198739883.pdfIn PDF document text
- http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/gpamdpal97564katqc4avv7mo3/mabaxagetozapur.pdfIn PDF document text
- http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b85801b526a---71809255989.pdfIn PDF document text
- http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/cbn6ohee34stblrmmqn18kncn3/kizewetumuzapomirupil.pdfIn PDF document text
- https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/f696a6699d6f9cbc3ef767516fc59cea/6616364589.pdfIn PDF document text
- https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c93e8bac2---35288749150.pdfIn PDF document text
- http://robalton.es/Albums/images/file///56974671654.pdfIn PDF document text
- https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af81d05900---84874711723.pdfIn PDF document text
- http://pho32shabu.com/uploads/files/68818616798.pdfIn PDF document text
- http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160716025d4a6e---dixokajefu.pdfIn PDF document text
- https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/a7v4c9pbd0b2seifkboqjbj601/wamenisume.pdfIn PDF document text
- https://nbtele.com/en/cache/fck_files/file/35545203844.pdfIn PDF document text
- https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/a51c91d44a80a806ea8bc5694db1dd80/bufononaduxadu.pdfIn PDF document text
- https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdd4f15c9e---84689450097.pdfIn PDF document text
- http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c18d90d6864---24986861675.pdfIn PDF document text
- https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b5d07e3e9---lefer.pdfIn PDF document text
- https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/rejp1rmmk4tobfps402fp1r5c2/nasuvute.pdfIn PDF document text
- https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/ac9ba921d72f102c312314c363583997/60108593532.pdfIn PDF document text
- https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/67b4cffb5591ee9a9ae3eef4f6e4d8ac/pijuwoporuguxolodosabelen.pdfIn PDF document text
- http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab83d5d9a9---39749920894.pdfIn PDF document text
- http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4d22234d1---kaxarule.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=indian+yellow+ricePDF link annotation
- 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010154.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10154	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011966.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11966	18800 bytes
SHA-256: `cfa6871fdc1be7bb7172ef1e96dd80b61c38e54d870f5f05cacf86e26a74d9d1`
`font_02_sfnt_off00014a97.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14A97	10248 bytes
SHA-256: `364986986f8f784bee882ea3e1248a62fcaa5d836d94b0741f5178a2eeba14f2`
`font_03_sfnt_off000161b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x161B4	16092 bytes
SHA-256: `9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd`

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