Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce8528008394dcf…

MALICIOUS

PDF

76.2 KB Created: 2021-03-08 22:56:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0b239bade4a2d4285b98f9893b8aa96f SHA-1: 250332fc386f5105c5b396d7f67f682ba2945ce2 SHA-256: 7ce8528008394dcf0975db681c509c764d5a7016bc3bae3adae6bc34d2e96736
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful sites. The presence of 'utm_term' parameters suggests a phishing or tracking campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=ghost+power+book+2+episode+6+air+date PDF link annotation
    • http://lifeeuro.info/unity_stencil_bufferqptrp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427097/normal_6023eaa07f6df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381737/normal_5fe6b7af76971.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420030/normal_5fe283ffaef45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388406/normal_5fcc01b13d9b3.pdfIn PDF document text
    • http://jatepot.22web.org/hipster_logo_template.pdfIn PDF document text
    • http://vsspb.ru/free_handwriting_analysis_testp39f9.pdfIn PDF document text
    • http://idealicaitalia.website/pibafakaniworojufepiqkq.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/wonitiduxufepuwujutojorig.pdfIn PDF document text
    • http://lnstagram-office.com/podumumaburajudetiniduva9227.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413242/normal_5fe502119d016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412894/normal_5fe7e9e1eac5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423780/normal_6042c9233e951.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/24011938880.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384634/normal_5fcd731a17391.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/50244854406.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_6016a894c2905.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bijipav.rf.gd/53316712168.pdfIn PDF document text
    • http://xofenilar.epizy.com/45407832316.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB08 5628 bytes
SHA-256: 935e4ef0953fe83ad4953a6a006be04594838c0e7fcfb5031237b820879df5b7
font_01_sfnt_off0000fe32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE32 10568 bytes
SHA-256: 90a638178c4409c5afc1f17e998775138e8c68992912819fbcdac0ddd4e6671f

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