Malicious PDF — malware analysis report

Static analysis result for SHA-256 4755d0f36f0a0427…

MALICIOUS

PDF

78.6 KB Created: 2021-04-02 07:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: bc62b6b5c1f15ef7523a657b22e20c56 SHA-1: 4251b4503bc5b6e281e0b890e260656703a5b5f6 SHA-256: 4755d0f36f0a042781403b021dd56710b3c3a897a799fb4cb1c25bce24c5ad7f
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, with a primary one pointing to 'seumenha.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be related to product reviews, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/wix?keyword=eliminator+ant+flea+and+tick+killer+reviews PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450641/normal_601d7fd1c1373.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388405/normal_5fc81b8b74c0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404108/normal_5ffcc569a4898.pdfIn PDF document text
    • https://zebilukirun.weebly.com/uploads/1/3/5/3/135306511/zopixotav.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/hAbvJhi/magiwisawaxeb.pdfIn PDF document text
    • https://buxijabis.weebly.com/uploads/1/3/5/3/135329720/bifubus-xisexarutixubuv-setinobi-fuponez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414848/normal_6005e98bd818c.pdfIn PDF document text
    • http://osmosiotzs.fun/winisixaxetiaz2rx.pdfIn PDF document text
    • https://cdn.sqhk.co/fagisuxupinu/igcgjDO/55841902651.pdfIn PDF document text
    • https://xurafexejigaf.weebly.com/uploads/1/3/4/5/134588012/833435.pdfIn PDF document text
    • http://store50off.info/33278887324a23zl.pdfIn PDF document text
    • https://biwewonopegad.weebly.com/uploads/1/3/1/3/131380063/26416f1715.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/39c1956e-c4b3-4648-a60e-dc92196359bd/nulaxubonixexedunovolil.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/jukidozuvasobod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9aee81b-4838-4c8f-8dfd-b569ad7f50d8/how_to_light_the_pilot_on_a_ao_smith_water_heater.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/24_piece_makeup_brush_set_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/twisted_treeline_ranked_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69b326a0-0160-4593-8bbe-c2f195fa60fc/tenvis_jpt3815w-hd_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/kozeni.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/cooks_essentials_2_quart_pressure_cooker_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eafb9be-ee73-4600-ba1d-4cb9470701f0/buruxikubamabofomur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4e31d54-18c4-41da-8ff1-66052377eba0/does_xfinity_have_security_cameras.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_off0000e934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE934 5340 bytes
SHA-256: 931d6c2b69f68fbfdee8d6a7077ce704ebdd82ef403cfa0df1b3c48b20c5eb50
font_01_sfnt_off0000fb57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB57 1936 bytes
SHA-256: cf50d13c5c21d2e34fba0d9dd21119d4839fc35fdaebfe62cbacf51850cc328d
font_02_sfnt_off00010496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10496 11252 bytes
SHA-256: 36c239b036f78f6cde80626e4786e77b3aacdf6f7f5e6725042390cb742daf5a

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