PDF malware analysis — malicious · 4b9a75c891f5eb54

MALICIOUS

PDF

87.8 KB Created: 2021-07-03 15:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 4d1dde4d878e50811136474df42ab0b1 SHA-1: 2c0443dc8e3a1941079b64e44d8125643f62ccbc SHA-256: 4b9a75c891f5eb54e800bc9fe3831b0ca93e3d50e39fdcb3b14e69a6e7e53f03

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress upload storage, suggesting it's part of a phishing campaign. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate a phishing attempt, likely to trick users into downloading further malicious content or revealing sensitive information.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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) 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://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708e3b2392d---69762310296.pdf In PDF document text
- http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50353634932.pdfIn PDF document text
- http://ibconsulting.it/userfiles/files/20119186697.pdfIn PDF document text
- http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090a0be12f04---lelav.pdfIn PDF document text
- https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53855926b3---15628454505.pdfIn PDF document text
- https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609341b951524---doxopodesiwozijaw.pdfIn PDF document text
- http://kzlo.pl/fotki/fotki/file/kejapuporovusapelorisawuw.pdfIn PDF document text
- https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/hj7bmser859i0dpv4d1u1l3bb1/nabofir.pdfIn PDF document text
- http://flemisterbauldingfamily.com/clients/8/82/82a21d9598fc66f9117a8fb7222c8fd0/File/wevizepigusi.pdfIn PDF document text
- http://saopauloairporttransfers.com/ckfinder/userfiles/files/numizonurivina.pdfIn PDF document text
- https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/00753328cc34769f215223155a21bbd4/12099396450.pdfIn PDF document text
- https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/65b7bcea5c6d7a2fd0dd3be317609046/derobitureram.pdfIn PDF document text
- https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/58921a631db941d42768bafbab571b58/lexivojeligifuf.pdfIn PDF document text
- https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/0ba9ce90439953c331fcada984e72a3f/81562439742.pdfIn PDF document text
- https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/n22mc64p5mm9brj6rtrbsd8j30/dokavelefiva.pdfIn PDF document text
- https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/c2d38bea2e37bc9bd35727686c8f6b95/6014790325.pdfIn PDF document text
- https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0099a27b0---3590781235.pdfIn PDF document text
- https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a77001d4594---luroliposaputuwasesi.pdfIn PDF document text
- http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49aec4391a---nodibodafutek.pdfIn PDF document text
- http://ttccid.com/userfiles/files/32627174862.pdfIn PDF document text
- https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/b7768267c2c48d9f8f69065db2c1acad/34598944428.pdfIn PDF document text
- http://exmar.it/foto_fck/file/repemurowesajo.pdfIn PDF document text
- http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a982c31537c---71115274776.pdfIn PDF document text
- https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/233f35f97ac948a9a61a735d913e029f/49130119197.pdfIn PDF document text
- http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cf80ccbedcc---mimulu.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=principles+of+design+picturesPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f642.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF642	10732 bytes
SHA-256: `2ae89dc7c1e37c6fc659447ba529ea8d882abdc5f48e009be3f4aec657c13358`
`font_01_sfnt_off00010ecd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10ECD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000126df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126DF	16664 bytes
SHA-256: `4092504e5a66dc8174ed6dc8ab0a016572db266da2cfc3ec80113236e7134723`

Open this report in the interactive analyzer, or submit your own file for analysis.