Malicious PDF — malware analysis report

Static analysis result for SHA-256 6001a0c94f157825…

MALICIOUS

PDF

74.5 KB Created: 2021-09-01 09:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f633a35c57f12fb7d7915c68bb18b4e7 SHA-1: 2dee0494d6ef910a53bda65572265afd64db568a SHA-256: 6001a0c94f1578259b2b8c932b44a9b4486aa74dc40e7912a860db5caf6170b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains numerous external URIs and links to compromised WordPress uploads and disposable hosting, suggesting a link farm or SEO poisoning attack. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://nomylo.ru/uplcv?utm_term=cagney+and+lacey+characters PDF link annotation
    • http://short-story.ru/upload/file/zulev.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/58717115506.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/1rse9ol23bntvuragl45kqlkd9/mozufexaniberizekidigenum.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a3135d9c1e9---54665140837.pdfIn PDF document text
    • https://asi-filter.pl/files/file/roditaxef.pdfIn PDF document text
    • http://rulada.by/upload/editor/files/dopifevipav.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4839a2579---fitoxutedugelowukajewu.pdfIn PDF document text
    • http://ablerexthailand.com/userfiles/files/29249372330.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/1e10a09c6dd08923d27a633dffbd5805/43156699357.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6bd385ef159db9b3220fcedc254e45c0/11881685678.pdfIn PDF document text
    • http://4bx.pl/public/file/zegofiruxere.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/68401882036.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc9375906d---67835871853.pdfIn PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/39261642342.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa35dc22e2b---merefuvuboradimo.pdfIn PDF document text
    • https://flyfinz.com/userfiles/files/roketoxeberanokozurunu.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c275d539ec1---xafalobiruwadidinuke.pdfIn PDF document text
    • http://olympusflights.com/files/files/vizofozovuwisoxenekuluji.pdfIn PDF document text
    • http://emurus.jp/userfiles/file/38091032520.pdfIn PDF document text
    • https://patoman.ro/ckfinder/userfiles/files/lewonemupisetemawemuxiseg.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/ac09e29d4302c562208d89bce788de65/bobonuwavorupakanu.pdfIn PDF document text
    • https://attack.lt/images/files/solonutewulikag.pdfIn PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/83382057672.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC056 10580 bytes
SHA-256: 6ff7cacd8b2a53c59a2c31af948e12e3e52a987119bbe60740ccebcf81c3949b
font_01_sfnt_off0000d849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD849 17200 bytes
SHA-256: cb4249458d2dc811299df63c8751d63705a5da93629bdd28bcc16f102ec3b1cf
font_02_sfnt_off00010423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10423 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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