Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4fe65ce3fda81cf…

MALICIOUS

PDF

72.4 KB Created: 2021-04-14 15:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5c887d22b31b2d531c472ae9857eebe7 SHA-1: db0a04464fee5538c7891539b83737d7ed908641 SHA-256: e4fe65ce3fda81cf281052089461f69c9c832d3c2bcbd6b5fa8239cda7d0ecbf
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, indicating a high probability of malicious intent. The document presents itself as a manual but contains numerous external links, suggesting it functions as a link farm for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document, likely delivered via spearphishing.

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://lozipotod.ru/strik?utm_term=frigidaire+stacked+washer+dryer+manual PDF link annotation
    • https://cdn.sqhk.co/remimidotomi/QliiKgh/galaxy_shooting_melbourne_fl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_604919bd425b4.pdfIn PDF document text
    • https://darojavanobize.weebly.com/uploads/1/3/4/8/134889586/malisodogidaz.pdfIn PDF document text
    • https://kusejibetejoxer.weebly.com/uploads/1/3/4/7/134749151/1799316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417319/normal_604b88c352001.pdfIn PDF document text
    • https://bejivuvepezera.weebly.com/uploads/1/3/4/4/134437422/xujuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479446/normal_6046d02d591ab.pdfIn PDF document text
    • https://pebevakulowuju.weebly.com/uploads/1/3/5/3/135323022/dawelusur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427811/normal_601fc65d8ae19.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/uifghwT/zerumatidaguj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475999/normal_5fcc5c0706e70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368492/normal_60036f73c7721.pdfIn PDF document text
    • https://tozarezev.weebly.com/uploads/1/3/4/3/134374844/672bf85c084.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452400/normal_5ff272894e239.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426072/normal_5fe2ae866389a.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/fosagoba/android_horizontal_progress_bar_material_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33af70c1-9d4f-4c2e-8693-ce926a6de351/soponufoxepakirowop.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/books_to_read_if_you_like_diana_gabaldon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc87128d-6f2a-4e05-8fe2-e1a9b1bc30df/information_security_handbook_for_network_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/binary_options_trading_books.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_off0000dd37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD37 5568 bytes
SHA-256: 298ed82fe1919009c345105b74c4de248bd5643635cd3b5fdfa102ce7d192606
font_01_sfnt_off0000f01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01B 10416 bytes
SHA-256: f1f46c409b5d1a18d5a58df2851ef929cf1a663c2ca808878fc79d5ab2193e75

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