Malicious PDF — malware analysis report

Static analysis result for SHA-256 69dbe913911b1e0f…

MALICIOUS

PDF

75.4 KB Created: 2021-03-10 08:56:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 35162db54aea285f90a3d0681cb8be80 SHA-1: 850c90f8c27e3e1d576b1c9d1676b99d8f661437 SHA-256: 69dbe913911b1e0f2761a96388b0146001e3859f2864e64ed47060b635fb67c3
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, with a critical heuristic firing for ClamAV detection. It contains an embedded URL pointing to 'bologen.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'Biostatistics carter center pdf'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a malicious intent to redirect the user to a harmful site.

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://bologen.ru/award?keyword=biostatistics+carter+center+pdf PDF link annotation
    • https://cdn.sqhk.co/letijefa/ehcO2Bl/gatasawinum.pdfIn PDF document text
    • https://cdn.sqhk.co/bikugipozamu/d4sW4Hy/biwadukexok.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzikewed/hhchdJZ/sufagazogojajizoroz.pdfIn PDF document text
    • https://cdn.sqhk.co/zaliroded/dKvii15/40131071338.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460461/normal_603c086e440d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393018/normal_5ff773f92a1da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404116/normal_600cbfb170ef0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501645/normal_603e476244b81.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/fboXiiX/11253700811.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/z3ghaia/22710440454.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/bbgzf1L/legends_of_runeterra_brasil_twitter.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvotalek/Ywghjc0/mccormick_poultry_seasoning_turkey.pdfIn PDF document text
    • https://cdn.sqhk.co/nemazuwigumo/ehYFD3Y/weekend_at_bernies_2_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/dojidavos/jbsggNO/ps4_emulator_android_2020_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sebixodof/ifSJ6gc/remofiwijalogewakixabifi.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/Xichjbc/arcade1up_mortal_kombat_riser.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://linakagiwabofa.epizy.com/gabatirusarugivar.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/75769798667.pdfIn PDF document text
    • http://bafilus.epizy.com/shimano_ultegra_di2_disc_group_set.pdfIn PDF document text
    • http://gatapin.rf.gd/speak_now_1_teacher_s_book.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/2575916605.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_off0000eac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC8 5164 bytes
SHA-256: c6fa7aa2a500a6e68d373be822b8f8e35684fca15aa7cd70d7253a0266067478
font_01_sfnt_off0000fc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6D 10520 bytes
SHA-256: 25b2c2d4112445a8376052590a204bd726f057d92831fe9f21548ccf08d14792

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