Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace4f988ae4be223…

MALICIOUS

PDF

85.3 KB Created: 2021-05-12 07:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7c63095bc3b862aeca5968ec87a0e7d8 SHA-1: 74ff4835f32b9d235e40c977f00a80c0a9fbe2ed SHA-256: ace4f988ae4be22302524bf8ffd909728aaf1df21391488857599549a3c84757
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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 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://seumenha.ru/strik?utm_term=how+many+carbs+are+in+a+dunkin+donuts+latte PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495988/normal_5fc8054cc22b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418379/normal_605c7129c90b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401525/normal_606d4b852184f.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/ggjjcjf/33026054643.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/Y6Xiaie/senetulanegazutumo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465389/normal_606e190c55b36.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/igbRl1P/bottle_shooter_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/gjChNJP/peviboruzap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388427/normal_604f5a2445ef6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469836/normal_6011a2bf1a071.pdfIn PDF document text
    • http://tajupodibo.iblogger.org/podujixilerib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457847/normal_6008d87884beb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/garorowa/dark_souls_4_kings_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/41302391047.pdfIn PDF document text
    • http://batofudinub.epizy.com/94012341133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a78a2424-2a44-4a35-a5ed-735348c98c33/matar_a_un_ruiseor_personaje_principal.pdfIn PDF document text
    • http://jatotixizajud.epizy.com/kojufesupuvijakirabesimap.pdfIn PDF document text
    • http://zisibife.epizy.com/36286406736.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7af2dfc0-dcc1-4fd6-b098-b44878a39ff5/zajamebujavewobimuri.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/83039970772.pdfIn PDF document text
    • http://gakafola.epizy.com/48536371024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f922be9e-3afd-469f-90d2-a49eb75432b8/nozawox.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_off00010eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBA 5444 bytes
SHA-256: 38fe6a07be2e94bda6d81c698c4b39539f32abfe4b1bb23e5b2652efc288a268
font_01_sfnt_off00012135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12135 11516 bytes
SHA-256: 99774c99554f5e3f974b4286fb64800e5993be6d97c9ec1f05727fbd103a5360

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