Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0df71b14872915b…

MALICIOUS

PDF

86.9 KB Created: 2021-03-29 16:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffa9c7970d0fb12bc0e1739a6dab4e39 SHA-1: 2944e597cd8cacc33544e6be088f75f1d2ecbff7 SHA-256: f0df71b14872915b4469bfc5e54d441e672de0f103cf6ad3b3dd593959838635
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm or phishing operation. The document body, though heavily obfuscated, suggests a lure related to 'tranya bluetooth headphones pairing', aiming to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=tranya+bluetooth+headphones+pairing
    • http://sejujanovemo.medianewsonline.com/organic_chemistry_alkyl_halides.pdf
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/gorurepopeju.pdf
    • http://lowwsaw.xyz/black_and_decker_cordless_weed_wacker_charger137jz.pdf
    • http://tiktokfrance.fun/45323057551gm6xy.pdf
    • http://carins.info/authentic_happiness_audiobookh4ke2.pdf
    • http://nakalabaxis.mywebcommunity.org/60464992601.pdf
    • http://5-euro.info/48353549673jpt9v.pdf
    • http://fb-ig-violation.com/74070906962353t0.pdf
    • https://buvefejam.weebly.com/uploads/1/3/1/4/131453018/mejufobopoma-guzolo-kuzapoka-bezokovovoferol.pdf
    • http://helpcontactform.com/15583997671lej6c.pdf
    • http://introdom.ru/gavazegawunasazevisazogo2.pdf
    • https://pepedojimu.weebly.com/uploads/1/3/1/0/131069997/wonuresuzomev.pdf
    • http://reduslimitaly-official.site/proposal_writing_stepsdb273.pdf
    • https://gofadoden.weebly.com/uploads/1/3/4/6/134615513/temekozatovu_lufijigake.pdf
    • http://podarokinsta24.online/boxijebelinosumewejuroqr33.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tawosutosuxi/kakaotalk_app_store.pdf
    • https://uploads.strikinglycdn.com/files/eb828c11-0495-455c-8071-f116a033c925/multiple_intelligences_test_for_kids.pdf
    • https://uploads.strikinglycdn.com/files/85a5bdea-79c6-45a9-9f9b-291d9419052f/nuvozixupegidolas.pdf
    • http://mifojizu.myartsonline.com/afcat_1_2020_question_paper.pdf
    • https://s3.amazonaws.com/gorajikunobixi/ruzuzif.pdf
    • https://uploads.strikinglycdn.com/files/8b149139-7a13-4166-bcfd-5c289673de39/tesla_model_3_long_range_rwd_specifications.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115f3.bin
6dc632c608a306a774e23ca98f3f92f1f145933e623411a29973d7cdc6f58143		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115F3 5412 bytes
font_01_sfnt_off0001284b.bin
208a0955918bed6dce8b2da88d879cddc27d45b9c02951ce98349ae9755d51b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1284B 11328 bytes

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