Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc6a0829ff84a6a…

MALICIOUS

PDF

75.6 KB Created: 2021-03-02 20:37:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 01f0030fbca1ac0a944f5c7261c9a3f3 SHA-1: 097aeb17f70e863d4a218689683eefabe72be67c SHA-256: 3cc6a0829ff84a6accde681074a327c48065a3ec9b086f90f5654b382e7b8e89
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, with 'https://mezovuduw.ru/strik' and 'http://zugapuvu.mywebcommunity.org/18454601959.pdf' being prominent examples. The document body, though heavily obfuscated, contains text that may be related to the lure. No scripts were extracted, but the structure suggests a phishing or content-farming attack.

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://mezovuduw.ru/strik?utm_term=whats+up+italian PDF link annotation
    • http://zugapuvu.mywebcommunity.org/18454601959.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366047/normal_5ff281a4abe2a.pdfIn PDF document text
    • https://jetujipizi.weebly.com/uploads/1/3/0/8/130813705/kuxizerot_zezeviresezi_putokeb_ziweso.pdfIn PDF document text
    • https://fikuwigo.weebly.com/uploads/1/3/1/0/131071253/5558561.pdfIn PDF document text
    • http://mexuloxuxinona.iblogger.org/arduino_bluetooth_shield_android.pdfIn PDF document text
    • https://xemizumelisiga.weebly.com/uploads/1/3/1/8/131856695/kokagafesesomatolot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425009/normal_5ff21d6e7f2c5.pdfIn PDF document text
    • https://dobuwejakunarek.weebly.com/uploads/1/3/4/7/134772316/6214701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_60180b51957c7.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/95053314136.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374951/normal_5fdeaf19d4c3b.pdfIn PDF document text
    • https://sagakoto.weebly.com/uploads/1/3/0/8/130814189/zajajifuze_ribetoloxogef.pdfIn PDF document text
    • https://tofavasexivefet.weebly.com/uploads/1/3/4/5/134578877/fizufagovutu.pdfIn PDF document text
    • https://fozujivopaj.weebly.com/uploads/1/3/5/3/135303700/5d7d0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407991/normal_5fcea61fe1c90.pdfIn PDF document text
    • https://tobalewaluwe.weebly.com/uploads/1/3/4/4/134437424/3030779.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jedabotuz.epizy.com/blood_drop_vector_eps_free.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_off0000ecde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDE 4824 bytes
SHA-256: 0ec1738cbdc17b2a1e6f1b5b44d287d5b80d79c88615a28f0a6c485601d26f7d
font_01_sfnt_off0000fd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD54 10640 bytes
SHA-256: 4752aa3750232146bd20355088db137c3a1323cc48ad9fc59985f58bfb10e9fc

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