Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdbfaefa5f682a0b…

MALICIOUS

PDF

77.7 KB Created: 2021-05-09 08:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: adededdd43429ccc292e5f3398274b5c SHA-1: bcc83890fada9905ae700e4767751bd59b4980db SHA-256: bdbfaefa5f682a0bd9a9613edbfd155fc0d43ac61f65afb5e96dd3acb738523d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to suspicious domains, and a heuristic specifically flagged it as a link farm for SEO purposes. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/strik?utm_term=vocabulary+workshop+level+d+unit+1+pdf PDF link annotation
    • https://jawizadobem.weebly.com/uploads/1/3/4/7/134773472/ledanuvusuvaser.pdfIn PDF document text
    • http://polystate.ru/17222432957edjxc.pdfIn PDF document text
    • http://itawegan.space/601825822083vmjf.pdfIn PDF document text
    • http://gosunenibunale.getenjoyment.net/alex_rider_stormbreaker_comic.pdfIn PDF document text
    • https://ranazujip.weebly.com/uploads/1/3/5/3/135398887/6964880.pdfIn PDF document text
    • http://trysoda.pro/tafalikemanubifadux8rlb2.pdfIn PDF document text
    • https://zaxadumumuguxe.weebly.com/uploads/1/3/1/4/131454216/gubininegigokukaso.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/maze_runner_3_film_streaming_itas1ntc.pdfIn PDF document text
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/jubunebolosezo_vezegufejupu_pirifim.pdfIn PDF document text
    • http://foxiduwanati.mygamesonline.org/keurig_mini_plus_black_friday_2019.pdfIn PDF document text
    • http://lugabev.mygamesonline.org/third_world_countries_definition.pdfIn PDF document text
    • https://kitejunozog.weebly.com/uploads/1/3/4/3/134319277/pifokipo-fokejo.pdfIn PDF document text
    • https://zafubunemajuz.weebly.com/uploads/1/3/5/3/135314528/nuronafumomo.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/56804833980m0nku.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/sigobija/formic_acid_salt_nmr.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/35022738922.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/61557801687.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/kidagivizilelazu.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/mukab.pdfIn PDF document text
    • http://desovizipelo.onlinewebshop.net/how_to_get_games_on_ti_nspire_cx_cas.pdfIn PDF document text
    • http://ralirajuz.atwebpages.com/jumbled_sentences_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/wuzekidipojinurekadovanep.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4F 5716 bytes
SHA-256: fce6a6e64bb128b7127838f92a7f32c475c54abea15b07807dec4e6d1b2a1f10
font_01_sfnt_off0000efe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE1 10304 bytes
SHA-256: 2ee8b7d7b8d3c282354fa1b1a3e15135ebd2aedfc03d8bb496c5e844f06ac851
font_02_sfnt_off00011328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11328 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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