Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67b925ecbfb9daa…

MALICIOUS

PDF

80.3 KB Created: 2021-06-07 00:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 86b67eddb0cb451b65a6c3b2f72853a6 SHA-1: aaa8231f2e224c138cf0c2723cc3fbd2f7c976ea SHA-256: f67b925ecbfb9daa2a0b22c73a7dbb5c4dd4eb27a6e2156c5b2cc24afa3ceb47
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL pointing to a domain that is likely part of a link farm, designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to contain keywords related to interview questions, 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://pixomot.ru/pbw?utm_term=how+to+answer+interview+question+about+conflict+with+co+worker PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393190/normal_60598a66e3543.pdfIn PDF document text
    • https://nagaxubonafebax.weebly.com/uploads/1/3/1/6/131606673/6276636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446283/normal_605a7f8c60306.pdfIn PDF document text
    • https://zapilututok.weebly.com/uploads/1/3/4/3/134341349/dilujudowu_laxebusesenet_gogod_xejisokafululej.pdfIn PDF document text
    • https://rufibomorogad.weebly.com/uploads/1/3/4/5/134505720/6982936.pdfIn PDF document text
    • https://rawuvuxa.weebly.com/uploads/1/3/4/0/134019107/xunuguneganex.pdfIn PDF document text
    • https://rodazikajoreme.weebly.com/uploads/1/3/0/8/130874285/1449328.pdfIn PDF document text
    • https://sizolofowexowar.weebly.com/uploads/1/3/5/3/135350689/webupid.pdfIn PDF document text
    • https://kadutazufe.weebly.com/uploads/1/3/4/6/134639852/6247266.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420036/normal_601d142f99448.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
    • https://uploads.strikinglycdn.com/files/7547b720-8e7f-4b50-8736-d832b26beb87/mivibirivovo.pdfIn PDF document text
    • http://jeselivid.pbworks.com/f/dg_packing_instructions.pdfIn PDF document text
    • http://lifuzopa.pbworks.com/w/file/fetch/144751707/simple_and_compound_interest_practice_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d529ed5-2b00-4075-b022-0e208406bcb7/scag_tiger_cat_belt_routing.pdfIn PDF document text
    • http://jukozatixul.pbworks.com/f/12188023615.pdfIn PDF document text
    • http://kizisoj.pbworks.com/w/file/fetch/144511992/how_to_use_shark_navigator_hose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6b2b97b-938b-475b-9c53-a42f7d7a22c8/more_brilliant_than_the_sun_kodwo_eshun.pdfIn PDF document text
    • http://midevodimu.pbworks.com/f/28758872311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73264ba4-ae2a-4c63-9378-e5d5d80bfe85/49046525621.pdfIn PDF document text
    • http://tejudafo.pbworks.com/f/describe_the_three_main_ideas_of_the_cell_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b1606a-abdc-4710-875d-f0c516368348/how_to_access_wd_my_passport_ultra.pdfIn PDF document text
    • http://vulazojab.pbworks.com/w/file/fetch/144751017/what_is_muscle_insufficiency.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_off0000ee82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE82 5292 bytes
SHA-256: fe2b7440870930b6e09c73e224f7f8e7c04cba6a1e91a6f3a186ec86517252e8
font_01_sfnt_off00010094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10094 10596 bytes
SHA-256: 1de0387037ab67b089a9bdb299d76294e86348d341a336f303f3b2e531075433
font_02_sfnt_off000124c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C3 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f