Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da16e2adeddb263…

MALICIOUS

PDF

83.1 KB Created: 2021-02-15 13:14:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 82f3aac6b79ae5195e0646188ad44c38 SHA-1: 85cac6e264c48b9ed4669e70eafcaf49b22ec2f1 SHA-256: 9da16e2adeddb26320b924724431403a49c0562ff105e7f02c7c2d54600b401d
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many of which are embedded within the document's structure, suggesting a link farm or redirection attempt. The document body, though heavily obfuscated, appears to be a lure related to a 'Whirlpool quiet partner i parts list'. The presence of numerous external links indicates an attempt to redirect the user to malicious websites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=whirlpool+quiet+partner+i+parts+list PDF link annotation
    • https://polovetanofup.weebly.com/uploads/1/3/5/3/135330247/fojizosolumit-nugutapo.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/hiMgia4/throne_rush_hack_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420600/normal_60160adc08169.pdfIn PDF document text
    • http://lnstagaram-verifiedbadges-from.com/gefelolitilosimuxazn4rx.pdfIn PDF document text
    • http://jejunobu.iblogger.org/reading_ielts_with_answers.pdfIn PDF document text
    • http://idealslimitaly-ufficiale.site/cambridge_latin_course_book_1v7wsz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_6015a01b5c575.pdfIn PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/xavusuw_raxisetodag_kosimadozawutaw.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/g9ifhhw/turbo_dismount_free_download.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/wotodedaruzuk/honor_8x_amazon_quiz_answers.pdfIn PDF document text
    • http://fotafufoka.epizy.com/88821388039.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/32941067703.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/top_10_card_collecting_games_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/73627611277.pdfIn PDF document text
    • http://jikelofov.rf.gd/74046668826.pdfIn PDF document text
    • http://lijizuzinarit.epizy.com/jivofagim.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_off00010771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10771 5044 bytes
SHA-256: e43004d4e31314d68df8b7e052a39c874571e44c88e4b230739813607ee01607
font_01_sfnt_off0001189e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189E 11432 bytes
SHA-256: 1f3f3f406d52aef90600f86d7c03569b9d60b89bdceda8518d24edb79ee6a723

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