Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f916af1678b6541…

MALICIOUS

PDF

70.6 KB Created: 2021-01-26 06:02:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f44071758fcec7ed1234fdb4c6d23230 SHA-1: 248e45d943f92826b6e2aa0d3ad3083ed5ecf523 SHA-256: 4f916af1678b6541e32c90d64d9c304869d05f6862caab176bb70faf0d8af0db
96 Risk Score

Malware Insights

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

The file is a PDF document that contains a URL pointing to a malicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be a lure related to 'corrosion control methods'. The presence of embedded URLs and the ML classifier's high confidence score indicate a phishing attempt designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/123?utm_term=corrosion+control+methods+of+steel+in+rcc PDF link annotation
    • http://detonic-hypertonie.website/jeguvojununudafidefz7be.pdfIn PDF document text
    • http://pafekusiwajida.66ghz.com/momegeforufitenus.pdfIn PDF document text
    • http://universe1.space/speed_car_racing_free_arcade_racing_games_ps4xlnvd.pdfIn PDF document text
    • http://yoga-fitness.space/33219642290utdv9.pdfIn PDF document text
    • http://goldstein.capital/aerox_3_wireless_release_dateafyqd.pdfIn PDF document text
    • http://tgesheff.xyz/13845210478hfaf3.pdfIn PDF document text
    • http://immorta-cross1.club/jufan2vc9v.pdfIn PDF document text
    • http://websporizle4.com/ironite_for_maple_treesqo41l.pdfIn PDF document text
    • http://makedctl.site/zugewamumafuwaluxubumuxh02e.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/mujesogi/jujotebajofepi.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/49297919420.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/wordscapes_answers_1040.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/41960067489.pdfIn PDF document text
    • http://riramemixezu.epizy.com/surah_al_waqiah_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/novomu.pdfIn PDF document text
    • http://pewizofiwerobep.rf.gd/seximujosevabixavifig.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/felikumejadoximegofebesub.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/audio_editor_android_free_app.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/sitaxedalotevelidivadovop.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_off0000d9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CC 4956 bytes
SHA-256: 0a6a78f153f5ed8b539b6eb2a0d4d00121d0fe97c1a20092e12cef0a56055e9e
font_01_sfnt_off0000ea7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7C 10172 bytes
SHA-256: db15bade835faa7784cc1bc3cf538c37a8248007592c8bbc8ac8e8aae9afe2a2

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