Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b2178ecf6dabf77…

MALICIOUS

PDF

74.7 KB Created: 2021-03-30 21:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e9e95c180bcc6c624e2118c1f22fedb4 SHA-1: a210dfed4622420189ac5bcdff76a93ae68fd997 SHA-256: 2b2178ecf6dabf7778432a7db0f774fdae2bc4a507716f3ddafd4b698545b53b
134 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and multiple heuristics indicate it functions as a link farm designed to redirect users. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/award?keyword=building+construction+process+flow+chart+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465402/normal_603db658139df.pdfIn PDF document text
    • https://cdn.sqhk.co/nobukomorur/hfjeety/42563406273.pdfIn PDF document text
    • https://cdn.sqhk.co/mezomabesoki/L1jefhf/kanoleno.pdfIn PDF document text
    • https://cdn.sqhk.co/jenexovu/6ddiagd/xejovotigijetafuvu.pdfIn PDF document text
    • http://acupofjacob.com/formulaire_ordre_de_virement_banquefxn15.pdfIn PDF document text
    • http://kolometagavim.22web.org/tedexodumesu.pdfIn PDF document text
    • http://honey-love.ru/jebesilutetepetasineq31ud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495696/normal_60587a8d4590a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493266/normal_5ffcac668790b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373505/normal_5ff52c02c0b11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367643/normal_6001cffd807ba.pdfIn PDF document text
    • http://vedibekupuviru.iblogger.org/superheterodyne_local_oscillator_circuit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e971b67-e44e-4cd7-a33a-910d8133c1c7/68742206321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d47e53e3-7a93-4717-a4ab-25fd409cd413/niv_life_application_study_bible_thumb_indexed_leather.pdfIn PDF document text
    • http://lagefow.epizy.com/bnf_73.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ae80d90-22db-48e9-ae05-72e470d29571/56868476311.pdfIn PDF document text
    • http://fatufad.rf.gd/18804220064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d79746e-c83f-4551-804d-1d6889146db6/how_to_sync_xfinity_xr11_remote.pdfIn PDF document text
    • http://migusopugaj.epizy.com/toxic_wap_shazam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b240e7d8-e5ea-4ca0-b1fa-e082ba7802a8/tc_helicon_voicelive_play_vocal_effects_and_harmony_pedal_review.pdfIn PDF document text
    • http://xefujuji.rf.gd/xobetavejuke.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_off0000e5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D5 5556 bytes
SHA-256: f21a02a15dbe8a717ec5ed8136d6d25d2acff80103a64c4463a64ef75971cb59
font_01_sfnt_off0000f8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CD 10560 bytes
SHA-256: 7216dceb6af660460d8e02178d43fb5feda4029d599b2560dbfad11f7d12c3b2

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