Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a06a4c398dd7919…

MALICIOUS

PDF

81.9 KB Created: 2021-04-06 20:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 65bc868ae43fca2ae184d3189a24d5c0 SHA-1: 6fff23bb71adf04d905dbbdbf04938b851adc224 SHA-256: 0a06a4c398dd7919ab95e00558bc1649c49b3f664fc050ee9da5590d207d577d
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to deliver a malicious payload or phish for credentials. The document body, though heavily obfuscated, suggests a lure related to 'ihk bremen berichtsheft pdf'. No scripts were extracted, but the presence of external URIs and the nature of the ClamAV detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/award?keyword=ihk+bremen+berichtsheft+pdf PDF link annotation
    • https://cdn.sqhk.co/sovanoniwuva/fiijgji/biganakuzumowide.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/descargar_manga_berserk_gratis.pdfIn PDF document text
    • http://tk-pobeda.site/lavuvinekagelurz03.pdfIn PDF document text
    • https://cdn.sqhk.co/letabuner/iNppfjd/fudizetiru.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/aaron_t_beck_booksmux0q.pdfIn PDF document text
    • https://cdn.sqhk.co/semegopo/hHihhbp/duke_women_s_basketball_head_coach_salary.pdfIn PDF document text
    • https://cdn.sqhk.co/kojupiloxifi/gd0picJ/14766728969.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xalixonawi.atwebpages.com/kemedup.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/dictionary_french_english.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/building_cross_platform_applications_with_react_native.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/tubozorujepimugovuxexefar.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/rocktron_banshee_2_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/how_long_do_babies_sleep_at_night_by_age.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/bollywood_movie_in_hd_new.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/inbound_marketing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/bloody_roar_2_apk_data.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_off0000fd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD50 5296 bytes
SHA-256: b5f47863937a9521b3cb141a141d7bccc23f0477ea58ce6413ed52ff7ff77de5
font_01_sfnt_off00010f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F27 12952 bytes
SHA-256: 23fb9fe7b71720bad943c978ec5e7e7b68863908c55564eb32ee03c46e463785

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