Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2896337ad165e7…

MALICIOUS

PDF

80.5 KB Created: 2021-04-22 16:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: da5f81fd00935ba180ef959c2fa14e05 SHA-1: 64c50d979791568fe83a5d20b0c349356fb156e7 SHA-256: cc2896337ad165e7e66c327ccfe35b739c69bfb5249ccdb53f1c8889e6ede0b2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one prominent URL pointing to 'vilenefex.ru'. This suggests a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing document designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=how+to+see+through+a+microscope PDF link annotation
    • https://bufekebutejef.weebly.com/uploads/1/3/1/8/131856184/08a35f300.pdfIn PDF document text
    • https://wowemaba.weebly.com/uploads/1/3/1/3/131380083/44912936e5.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/blood_hunter_5e_1._91p148.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/hcggNQG/80511224907.pdfIn PDF document text
    • http://tricitysikhs.com/2520635016zvq01.pdfIn PDF document text
    • https://cdn.sqhk.co/mitukutowum/r57V5gf/pulaperori.pdfIn PDF document text
    • https://vejanozamafiz.weebly.com/uploads/1/3/5/3/135351199/takunovazo.pdfIn PDF document text
    • http://cherrypimp.online/hp_deskjet_2132_print_from_phonecasb8.pdfIn PDF document text
    • https://zegokovoni.weebly.com/uploads/1/3/4/3/134323662/0460461e.pdfIn PDF document text
    • https://lobubanir.weebly.com/uploads/1/3/2/8/132814664/gusowinosureted-fobedinolebogu.pdfIn PDF document text
    • https://wujatukeki.weebly.com/uploads/1/3/1/8/131856991/5d593b.pdfIn PDF document text
    • https://cdn.sqhk.co/ruradavi/fhdjbjh/pureflix_app_download.pdfIn PDF document text
    • https://luwozupewudaxu.weebly.com/uploads/1/3/1/3/131384663/xatalefojobujojugin.pdfIn PDF document text
    • http://tameenegypt.com/livro_energia_e_meio_ambiente_download6cv94.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/vupiniduxijivewafezerubelr3440.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bomupi/wuwuwisome.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/9336403006.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/sketchup_free_downloadable_version.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/how_to_convert_delta_crib.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB8 5144 bytes
SHA-256: 9181b6eac6f126ad95fc2b2da1ad028dc62198d8f119e09991eda12ccada664f
font_01_sfnt_off0001014a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014A 10856 bytes
SHA-256: 09eff88c7fb8002971d692cc689f5e59f392f49a56e52d8fdbac306fe87920b3
font_02_sfnt_off00012675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12675 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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