Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20df158ea2f0d68…

MALICIOUS

PDF

73.0 KB Created: 2021-02-10 21:38:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 60f9d99aebcff9b68e69a3ba63d9a410 SHA-1: f6312d04b0e33500bc4f17ff5cebb7cdf99b2f11 SHA-256: d20df158ea2f0d68cb6ae886b7189413831d17403ff8d2ac9d479b2bdf9cb356
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to artificially boost search engine rankings. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs, such as 'https://jottigo.ru/aws?utm_term=wrong+turn+hd+1080p+movie', suggest a lure to download or view content, likely leading to further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://jottigo.ru/aws?utm_term=wrong+turn+hd+1080p+movie PDF link annotation
    • http://vasupab.iblogger.org/amma_bhavani_telugu_songs.pdfIn PDF document text
    • https://kebegaxarebewu.weebly.com/uploads/1/3/4/0/134096812/2c17f.pdfIn PDF document text
    • http://divuwon.iblogger.org/23779389690.pdfIn PDF document text
    • https://nabezaxe.weebly.com/uploads/1/3/4/8/134852032/d17c4.pdfIn PDF document text
    • https://tikedamo.weebly.com/uploads/1/3/1/4/131453682/1189929.pdfIn PDF document text
    • http://toguvuveleguna.22web.org/pimune.pdfIn PDF document text
    • https://cdn.sqhk.co/tifapoxur/ijjWRha/soundcloud_repost_channels.pdfIn PDF document text
    • https://vutavevivusupe.weebly.com/uploads/1/3/0/7/130776898/7907372.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/eghhjic/foxawanuzejado.pdfIn PDF document text
    • https://cdn.sqhk.co/gapekozuwa/fsijGPL/teacher_appreciation_gift_ideas_during_covid.pdfIn PDF document text
    • https://kerozusokenizil.weebly.com/uploads/1/3/1/3/131383247/kipabuzifumuz.pdfIn PDF document text
    • http://waniwidolo.66ghz.com/bugidapojufo.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/voxazedisula/fusionner_plusieurs_foxit_reader.pdfIn PDF document text
    • http://bozudob.epizy.com/losonokibabiwiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/amrita_nayak_audio_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/lukemezikesivafezu.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/zafatava.pdfIn PDF document text
    • http://fobupozomorefiw.epizy.com/batman_arkham_origins_pc_trainer.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/belgium_national_football_team_formation_2018.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_off0000dfc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC7 5416 bytes
SHA-256: 1aa6b200e53a162ffa8859c455d1c5c3a737d9a291dd318c46d1cfd7631ca449
font_01_sfnt_off0000f226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF226 10676 bytes
SHA-256: cb8deb4809f401644dc14d4f226dab7ff750165862afb20727c1d94a30cf1799

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