PDF malware analysis — malicious · d7691c2eb85a0549

MALICIOUS

PDF

105.3 KB Created: 2021-07-02 12:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: b85bae3acf608c9856643e22004c9a0f SHA-1: 695d9493a32355ef8dd71b010d740b19ab66bf57 SHA-256: d7691c2eb85a0549b5d2e79011dd902a0bf83768394a23081fed41e045e24144

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting it functions as a link farm or phishing lure. The 'SE_CALLBACK_LURE' heuristic specifically points to a callback phishing or tech-support scam pattern, where the user is prompted to call a phone number. While no scripts were explicitly extracted, the presence of external links and the callback lure strongly suggest a phishing or social engineering attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9926

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://chcial.ru/uplcv?utm_term=class+11+account+question+paper+2077 PDF link annotation
- https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/1dcjkv747kucenfql6phj8m9he/xebeti.pdfIn PDF document text
- https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/ed3e37e134682760190ffc0b16471161/13336159823.pdfIn PDF document text
- https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/f399aed72338d54b06cb088144fcd533/raraxulexuweta.pdfIn PDF document text
- http://pinturasoltra.com/images/slider/files/1331239115.pdfIn PDF document text
- http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ac682252cd0---22339025594.pdfIn PDF document text
- http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/u966i1hfs700tjc02esm3r23cd/41603274058.pdfIn PDF document text
- http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5f540e56c---93279652294.pdfIn PDF document text
- http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f67d63201---tekesilaxesap.pdfIn PDF document text
- http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/564d6b0cbe591e486978bc4f8dd9307b/kodawekonubaxofukuxuxat.pdfIn PDF document text
- https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/eca2fffce2fbf85b617e0f7917ecadba/dudikixivodotul.pdfIn PDF document text
- https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8ae39eace---dugiru.pdfIn PDF document text
- https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/4e1njqrahmd3ud69smbspsk9sm/vasoxavudugukos.pdfIn PDF document text
- https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/f6b9a241510ff93bb8ac4015d090a07a/88557594141.pdfIn PDF document text
- http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8440994f03---xapewunulakowavanal.pdfIn PDF document text
- http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608641fa8a6ea---28463981006.pdfIn PDF document text
- https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/df5bb980b57475ad18c76ae494a1dcad/49620284974.pdfIn PDF document text
- http://tragadsonisurat.com/ckfinder/userfiles/files/kesalof.pdfIn PDF document text
- https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/kbupps6ut0857055q22nl2dk0k/51934197646.pdfIn PDF document text
- https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/gicdie53tvd84u772m9r9ji7mj/98488826548.pdfIn PDF document text
- http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/63384766379.pdfIn PDF document text
- http://qkmedica.com/uploads/userfiles/file/57169652681.pdfIn PDF document text
- http://shethof.ch/cgi-bin/dynamisch/file/81837245912.pdfIn PDF document text
- http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609492788d9c0---41824624104.pdfIn PDF document text
- http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec0be79b23---zidakopomefixapumaxi.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_off00013398.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13398	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00014baf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14BAF	10988 bytes
SHA-256: `e8ef5d7e3f4d2393e2436066c64c2c1ea818b5f042ec5c3ffd0b04704a7f02e6`
`font_02_sfnt_off00016579.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16579	18264 bytes
SHA-256: `d25acc2033e326cf6c7549667dce860e10cebb8059459471b72d187943aee5d0`

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