Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e14155764dc66a3…

MALICIOUS

PDF

67.2 KB Created: 2021-02-15 00:21:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 44d8ddd71df8c7813fe8d0102d649f8b SHA-1: de7063025ef144a1704ca69f23db8424196e9798 SHA-256: 3e14155764dc66a3060e4bffdb25c5d93639ddb0d7c6309b5027ea34f577cf42
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malicious link farm. It contains a large number of external links, many of which point to other PDF files, suggesting an attempt to distribute further malicious content or engage in SEO manipulation for malicious purposes. The document body, though heavily obfuscated, contains references to game cheats, likely a lure to entice users to click on the embedded links.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/123?utm_term=angry+birds+epic+cheats+code PDF link annotation
    • http://ins.expert/membrane_diffusion_lab_answer_key_phetjwk1z.pdfIn PDF document text
    • https://wefigoga.weebly.com/uploads/1/3/4/0/134041661/latowej.pdfIn PDF document text
    • http://xuvalikamug.22web.org/toy_defense_1_hack_apk.pdfIn PDF document text
    • https://wupovejiti.weebly.com/uploads/1/3/2/8/132814541/gizimodavarot.pdfIn PDF document text
    • http://copyright-services-us.com/risk_of_rain_characters_guide77x07.pdfIn PDF document text
    • https://nijikubu.weebly.com/uploads/1/3/5/3/135347783/nubarepemixa_zuruluje_xezom.pdfIn PDF document text
    • https://titobabedax.weebly.com/uploads/1/3/4/3/134317276/selinakuzaga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386594/normal_5fc768df9b43c.pdfIn PDF document text
    • http://nawididu.iblogger.org/80097958627.pdfIn PDF document text
    • https://gasaromub.weebly.com/uploads/1/3/0/7/130776100/4300641.pdfIn PDF document text
    • http://svoytrylend.xyz/oscar_wilde_movie_castuoi3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472773/normal_600f4a6384d26.pdfIn PDF document text
    • https://tepidupelagoxu.weebly.com/uploads/1/3/4/4/134472529/9974774.pdfIn PDF document text
    • https://wusuritod.weebly.com/uploads/1/3/0/7/130739885/mejakebizuwomot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485714/normal_600ecd5813dbf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wopari/92787965888.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/radio_astronomy_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/55036363137.pdfIn PDF document text
    • http://kagufunoziwezu.epizy.com/ruvazeloloza.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/baby_bjorn_travel_cot_sheet.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_off0000cb64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB64 5536 bytes
SHA-256: aac1e5fc813e8604d13d7bd7be400766de51fdcba557ddd290a264bd4aa4d980
font_01_sfnt_off0000de34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE34 9716 bytes
SHA-256: 6af0ebb5775f30c66f6b58119ddc2ac0b44d6d17fde1c4ddfdc7d57ef686062c

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