Malicious PDF — malware analysis report

Static analysis result for SHA-256 981159dbf916baa3…

MALICIOUS

PDF

71.7 KB Created: 2021-02-17 05:28:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c2f3bcea24913eb6ffd55b182dab4052 SHA-1: 281269a75f38b2bc1439bc72f04bcf1edd2bae65 SHA-256: 981159dbf916baa3a6b65f5019dd7e883c9e7cad22f40966309cbc74d1278108
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=beginner+computer+worksheets+for+grade+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5fd1beea0c198.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474471/normal_5fe242a9d4259.pdfIn PDF document text
    • https://pafufido.weebly.com/uploads/1/3/1/4/131407890/kofususolelaxo.pdfIn PDF document text
    • https://garepogive.weebly.com/uploads/1/3/4/8/134871831/xokifepepekosoridol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494430/normal_600e3826239e4.pdfIn PDF document text
    • https://vusowosunuk.weebly.com/uploads/1/3/5/9/135975823/8761231.pdfIn PDF document text
    • https://jetisinodab.weebly.com/uploads/1/3/5/3/135335938/7754345.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406464/normal_5fcaf7a5bd406.pdfIn PDF document text
    • https://mugibamarenov.weebly.com/uploads/1/3/4/1/134109107/4363365.pdfIn PDF document text
    • https://jareruko.weebly.com/uploads/1/3/4/3/134348829/f06bdc454456.pdfIn PDF document text
    • https://guvijubeb.weebly.com/uploads/1/3/5/3/135318684/1061670.pdfIn PDF document text
    • https://vitojeji.weebly.com/uploads/1/3/1/4/131453493/4ff1e4d033f8.pdfIn PDF document text
    • https://gumakamatiz.weebly.com/uploads/1/3/4/6/134600955/5066af08e06af.pdfIn PDF document text
    • https://bokosemebejira.weebly.com/uploads/1/3/0/8/130813317/4687111.pdfIn PDF document text
    • https://miletotafog.weebly.com/uploads/1/3/4/7/134758503/tezofelupujanob_vupijamafemel_xolavumel.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://lopovimefadepom.epizy.com/sc_caste_list_in_up_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/tutaruvosufiku.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_off0000cd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD70 5676 bytes
SHA-256: 45c4b8b19db53fde9ba03dc51c7e0fa734854ec08d31bb4b6ac6076b16998c20
font_01_sfnt_off0000e0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A9 10080 bytes
SHA-256: 1035e862fdab2867ea9dc05f141a7b4b3b277e698ae59c12e2bab7666111a3f2
font_02_sfnt_off00010334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10334 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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