Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e9c2026e8364743…

MALICIOUS

PDF

96.6 KB Created: 2021-06-14 18:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2cbd96b96142c00d1911bbb474fb9495 SHA-1: e5eea381dba0345d198ce9001fa511e4f4ee1bfb SHA-256: 8e9c2026e836474377433a3bca0c30c95a7a3cfd06600aacb6368a36ce2b6232
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 0.9950

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://huntic.ru/pbw?utm_term=happy+birthday+harsh+status PDF link annotation
    • https://jazujopu.weebly.com/uploads/1/3/0/8/130873842/6459849.pdfIn PDF document text
    • https://faliroralomi.weebly.com/uploads/1/3/0/8/130874474/8316feca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384634/normal_60198dace98d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462037/normal_601e2cf0aa34c.pdfIn PDF document text
    • https://pazixexawa.weebly.com/uploads/1/3/1/4/131437352/robisenesaguzu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446773/normal_60009ef05fffb.pdfIn PDF document text
    • https://bikujezojodu.weebly.com/uploads/1/3/4/5/134587809/8340413.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418984/normal_5ff75699cbebc.pdfIn PDF document text
    • https://dudezixibuwido.weebly.com/uploads/1/3/4/5/134529197/xopebeba_kujebawoxuv_gosoja.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4459937/normal_60b0af1ece6c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480187/normal_602f60d218703.pdfIn PDF document text
    • https://gatokoliza.weebly.com/uploads/1/3/0/7/130739470/7376419.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484994/normal_5ff1d0f16935f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410462/normal_6069fe104f2f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485166/normal_60249981dfff4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451565/normal_6026f65447673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_6033207d52d52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464301/normal_60531334b26e3.pdfIn PDF document text
    • https://refapezi.weebly.com/uploads/1/3/4/9/134904673/8b898.pdfIn PDF document text
    • https://raponomipa.weebly.com/uploads/1/3/2/6/132681826/3c8f27a791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451231/normal_600a576b9c890.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wiwedano.pbworks.com/w/file/fetch/144424098/pivurexurofesi.pdfIn PDF document text
    • http://marutipug.pbworks.com/w/file/fetch/144421368/bleach_brave_souls_hack_android.pdfIn PDF document text
    • http://muwixemuma.pbworks.com/f/zotozageriromoditofiv.pdfIn PDF document text
    • http://zubipuwaf.pbworks.com/f/sexepujimapisofir.pdfIn PDF document text
    • http://fevuxowina.pbworks.com/f/vekesuzurefakogos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000131ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131EA 4768 bytes
SHA-256: aa977ddb4d8bc55455a79c7429822f6c6ef10c6a5ff5d7fe025eea87f2200940
font_01_sfnt_off00014219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14219 10244 bytes
SHA-256: 0327d1d32ca2a03cb6147aecb75ba45f939474e74db5c69d2c32d24429f4e7df
font_02_sfnt_off00016508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16508 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71