Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0eeda3aa7acfdd…

MALICIOUS

PDF

79.2 KB Created: 2021-06-10 10:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 339a1db1438837dbff8c5ae6f0945eac SHA-1: 9c85cdb98ff70b2d5732d54b554836be44129bae SHA-256: ae0eeda3aa7acfdd2cf43bdfec97aed4092766045c56a8c8a530eb81844f4d96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a URL with a 'utm_term' parameter further indicates a phishing or scam attempt, likely to trick users into downloading further malware. ClamAV and ML classifiers confirm the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://infrive.ru/uplcv?utm_term=gta+san+andreas+v1+08 PDF link annotation
    • http://anandtouristcorporation.com/uploads/50065650792.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/wotofexabujomavaxid.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/tixogajulim.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c079302b4d8---jurofulosabojak.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/16290662001.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c0605d88e---90111923172.pdfIn PDF document text
    • http://fenotropil.ru/userfiles/file/95590539025.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c06e76156---godozadaxumivijotip.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/u2snno8bmbrtvej82r8equp8h3/mejutetejapulalagituzuvaf.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/virevepadojasafujegazojur.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/32961ba2fe5893005215e2682cb28593/73518270588.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f128aaa8b8---mutoligin.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/podezefojuno.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/80926072534.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/9636783620.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69D 5268 bytes
SHA-256: 8c1f0a4fa517784f28b327c4a92da9cc9696dc551db4ccde32a4a536f1c05920
font_01_sfnt_off000108a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A0 12708 bytes
SHA-256: 9423997084f15f1802752648cdd7950b66aac257328740aa51aefc60bee9fb50

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