Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7043bfd4598d400…

MALICIOUS

PDF

73.2 KB Created: 2021-01-26 05:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 431de3dff44b5b240d3795fc019c8de6 SHA-1: 2a903b1b07c515c6030df8293a6149fb339dc27a SHA-256: b7043bfd4598d400ee645d44887b4bf575ab59f343addc1d67f2c69cda9fa1ba
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains or link farms, suggesting a phishing or SEO poisoning campaign. The document's content, though heavily obfuscated, appears to be a lure for 'stay alive 2006 free movie download', directing users to malicious URLs. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to sites hosting malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://trafftec.ru/wb?keyword=stay%20alive%202006%20free%20movie%20download PDF link annotation
    • https://kibewibur.weebly.com/uploads/1/3/1/8/131856655/koponos.pdfIn PDF document text
    • http://itayoga.space/directv_now_customer_service_billing6ihml.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwuwigo/7wiivCO/39002828287.pdfIn PDF document text
    • https://rifijilaguselud.weebly.com/uploads/1/3/4/8/134846829/930e7247322658.pdfIn PDF document text
    • http://aarbuz.space/kung_fu_panda_dragon_warrior_poster_scenei4nah.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/a6hbMgj/dugelidemoferuge.pdfIn PDF document text
    • https://medefidonirefej.weebly.com/uploads/1/3/5/3/135324812/9f6641687e56.pdfIn PDF document text
    • http://detonicufficiale.website/19745490210xoubd.pdfIn PDF document text
    • https://cdn.sqhk.co/lixepupo/hftgghq/earl_of_sandwich_motel_east_sandwich_ma.pdfIn PDF document text
    • http://lulumel.66ghz.com/business_studies_notes_form_3.pdfIn PDF document text
    • https://lurusavi.weebly.com/uploads/1/3/2/7/132710630/vegefa.pdfIn PDF document text
    • http://zarabatyivat.ru/xetulekutosukavepuxupaxo8gkyx.pdfIn PDF document text
    • https://tusidotug.weebly.com/uploads/1/3/4/4/134482214/3018705.pdfIn PDF document text
    • https://zewijevatijafat.weebly.com/uploads/1/3/4/2/134265582/retesesawiruvoboli.pdfIn PDF document text
    • https://jedopebo.weebly.com/uploads/1/3/4/8/134889916/1098378.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/dhduItM/42999397444.pdfIn PDF document text
    • https://lugarulanug.weebly.com/uploads/1/3/5/3/135383187/2817849.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/iMgihe0/happiness_synonyms_in_telugu.pdfIn PDF document text
    • http://characduwe.space/dragon_prince_elf_name_generator8ka1d.pdfIn PDF document text
    • https://cdn.sqhk.co/kixepijap/gjifgdz/41201263548.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE211 5660 bytes
SHA-256: 42838e19e5586f704f2d5fe1579361baaf3721c7aad324cbf1b82dd4d6ea9a25
font_01_sfnt_off0000f561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF561 9908 bytes
SHA-256: e7a7242795a40983ef0ba6c2a95129d89cd41655f2758ce4843f85272efaeb46

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