Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a1e3d0c66be7c2…

MALICIOUS

PDF

76.3 KB Created: 2021-03-09 21:07:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2b07f2d8ac62b910b47fcdb687fa99af SHA-1: 346d88890a7d8e61c52ae40fb67769c0e2fbc31d SHA-256: 34a1e3d0c66be7c2cb3771c4bc955579cfd324ac90ea27ee91ab5c0cc2ef5988
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 0.9988

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://ponafet.ru/award?keyword=10th+class+maths+all+formulas+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413693/normal_5feb95203e8d5.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/h6nXRjh/rise_up_kane_instrumental_with_background_vocals.pdfIn PDF document text
    • http://forexgeeks.net/341438890165pjdd.pdfIn PDF document text
    • http://rerokofige.iblogger.org/pajesix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372963/normal_5fc60ce89df04.pdfIn PDF document text
    • https://wifojulov.weebly.com/uploads/1/3/1/4/131438113/de062f2ce8.pdfIn PDF document text
    • https://mirenixumevi.weebly.com/uploads/1/3/5/3/135309561/66ba13c388b36c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494874/normal_5fe6472ac0e5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451375/normal_5fcda3f5db180.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/jboiipC/46719133319.pdfIn PDF document text
    • https://melozepopi.weebly.com/uploads/1/3/0/7/130775643/toguvibemag_pituba_betap_zefanegetosolin.pdfIn PDF document text
    • https://dujezokedibu.weebly.com/uploads/1/3/4/3/134392169/cfed84827d94b2f.pdfIn PDF document text
    • https://cdn.sqhk.co/simizekovogi/eKkjdG0/dino_hunter_deadly_shores_download_for_windows.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/ciiplih/1572607629.pdfIn PDF document text
    • http://dorodirebupekel.iblogger.org/behringer_u-_phoria_um2_driver_windows_10.pdfIn PDF document text
    • http://twoup-viktoria.online/12671171521mjol5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fofifalog.rf.gd/79713283267.pdfIn PDF document text
    • http://suvumudupese.epizy.com/niwomadatewumutewepopu.pdfIn PDF document text
    • http://xafexepov.epizy.com/competitor_analysis_template_xls.pdfIn PDF document text
    • http://tirujukixiw.epizy.com/relawunaxajid.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE42 5492 bytes
SHA-256: f6d38623ab89341d2578b53cdb23d2c877710923cbb212c45725619d878d6f7f
font_01_sfnt_off000100c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C1 11888 bytes
SHA-256: e99276f24a93070b35761e6c0a74e50c0789e225eadf25e115ed6dcc4d342249

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