Malicious PDF — malware analysis report

Static analysis result for SHA-256 197faa2ead3b3afa…

MALICIOUS

PDF

79.1 KB Created: 2020-12-25 14:16:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 54b69a1019f1f5d875fad2b947c24b33 SHA-1: 50861dd19970c21d372dbc962a1b2a2d87c305b4 SHA-256: 197faa2ead3b3afaea2288e31d08914a678c3afbfa13d2663af97899661bc9e9
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating it likely contains malicious content. It functions as a link farm, with numerous external URLs embedded within it, suggesting a phishing or SEO manipulation scheme. The presence of external links, including one pointing to 'traffset.ru', indicates an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://traffset.ru/strik?utm_term=love+letters+for+girlfriend+tagalog PDF link annotation
    • https://fuvexowigirupog.weebly.com/uploads/1/3/4/8/134896800/041ffd263211.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/sawuxezowob.pdfIn PDF document text
    • https://wikefazopikevi.weebly.com/uploads/1/3/4/7/134715570/wukoba.pdfIn PDF document text
    • https://cdn.sqhk.co/nosuterib/eWidBie/sputnik_russian_alien_movie.pdfIn PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/6759591.pdfIn PDF document text
    • https://bigubiforuse.weebly.com/uploads/1/3/5/3/135389938/dofutusokasura-miwowodufireki-befopemidub.pdfIn PDF document text
    • https://cdn.sqhk.co/sakiforivona/khjjcpH/51401054651.pdfIn PDF document text
    • https://vodeveta.weebly.com/uploads/1/3/4/6/134611656/0ca9360bd77a.pdfIn PDF document text
    • https://lawejuja.weebly.com/uploads/1/3/0/7/130740077/5297633.pdfIn PDF document text
    • https://nixixufusolawig.weebly.com/uploads/1/3/4/8/134882604/7147066.pdfIn PDF document text
    • https://jetujonupukoj.weebly.com/uploads/1/3/1/1/131163664/natuloso-jadego.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/5208061.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/emily_grayson_brentwood_tn.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/joie_travel_cot_sheet_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f5f97a5-2fc3-4b09-9732-3c925cc75a32/86583567831.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CE 5076 bytes
SHA-256: 0b371a6e81fb11e2494abbc58ede7c9b97a4d605ba2c822a6c956c17dc070bd9
font_01_sfnt_off0000e427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE427 4692 bytes
SHA-256: 9b907fc92d45654bd9d888925086b37d59554a2e1cfa0da7dfca4baf6cd40531
font_02_sfnt_off0000f347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF347 11180 bytes
SHA-256: abe8811c4345948e2a6173099b0941f690b77961b7309c1dd87d38cd1b130cd2
font_03_sfnt_off00011999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11999 16168 bytes
SHA-256: 794d8cc090a449e0d460036171b2d5b2c749cb0dc3f17972c44626ada68ee3d8

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