Malicious PDF — malware analysis report

Static analysis result for SHA-256 94684632ce0a36c3…

MALICIOUS

PDF

74.7 KB Created: 2021-06-14 18:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1da59cfa1423878de9b266f36530c7fd SHA-1: 3af7152b862a4fbf933db77518d73a1aed538dcd SHA-256: 94684632ce0a36c394273953486b6ec169c7e0bc68209ec6d6513d1a974e10bd
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://pistant.ru/pbw?utm_term=the+mistress+of+spices+full+movie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401723/normal_60304dcf2e336.pdfIn PDF document text
    • https://gofabede.weebly.com/uploads/1/3/1/4/131453232/2676d9f65f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414153/normal_6029cb686ff66.pdfIn PDF document text
    • https://gatixitawenubik.weebly.com/uploads/1/3/4/6/134643062/nopugit_gubukuga_folavuna_zafivunaki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446789/normal_5fd6ed47852b7.pdfIn PDF document text
    • https://gedozunirep.weebly.com/uploads/1/3/1/0/131070722/bafafafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408719/normal_602fa440335ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447250/normal_600df04f163ee.pdfIn PDF document text
    • https://dunegigamirusa.weebly.com/uploads/1/3/1/4/131437715/pijeratemuvag_fazafu_rabuwamumox.pdfIn PDF document text
    • https://leduxuma.weebly.com/uploads/1/3/2/8/132814900/sukajamegaka.pdfIn PDF document text
    • https://wivesape.weebly.com/uploads/1/3/4/5/134510767/zesobujunavi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405903/normal_5fe673849ed99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378621/normal_6038b3c5bb932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386822/normal_5fd342b4a7934.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420025/normal_6068627293257.pdfIn PDF document text
    • https://ralokokotozupar.weebly.com/uploads/1/3/4/3/134340958/jezenowupifoxefe.pdfIn PDF document text
    • https://mozijazese.weebly.com/uploads/1/3/4/4/134460989/gevib_legeguno_vipuf_kuxoxutu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457849/normal_603ee5424ae80.pdfIn PDF document text
    • https://voxesisa.weebly.com/uploads/1/3/4/3/134349259/6b85da849.pdfIn PDF document text
    • https://bunadijora.weebly.com/uploads/1/3/4/4/134432215/loxewof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494417/normal_601e4c815f7ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483070/normal_6042f460cf17b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuvabufoj.pbworks.com/w/file/fetch/144564225/guns_of_glory_asia_mod_apk_unlimited_money.pdfIn PDF document text
    • http://fibonilavi.pbworks.com/f/94512771257.pdfIn PDF document text
    • http://jotoxipigi.pbworks.com/f/60871698655.pdfIn PDF document text
    • http://durerosika.pbworks.com/w/file/fetch/145292841/90989954989.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_off0000e7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AE 5052 bytes
SHA-256: 1f37ea89630d8cd194545bf4ce4987b34d49611c79a0f23e78dc723e9f2b2582
font_01_sfnt_off0000f8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C4 10988 bytes
SHA-256: 59792cc5aaf24fd5bab8142a58ba390d4e69c8aa588d418506f7495062d4f6ff