Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca55d87f2c77dc3…

MALICIOUS

PDF

274.2 KB Created: 2021-04-06 12:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 68bb6b1e46ee27882d2564cb10911042 SHA-1: 123f018b1fe3619523992073908891f451a592e2 SHA-256: 6ca55d87f2c77dc3232833f6c40e773236b56f9ffc1dd172d3d85feab52befb7
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1190 Exploit Public-Facing Application

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a suspicious domain, and multiple other URLs that are likely part of a phishing campaign. The 'SE_MFA_LURE' heuristic indicates the document is designed to harvest credentials or MFA codes, consistent with credential phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9755

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://druttle.ru/wix?keyword=hoja+de+registro+de+limpieza+y+desinfeccion PDF link annotation
    • http://groshyk.site/89662447739edfg9.pdfIn PDF document text
    • http://zenelis.iblogger.org/97128669596.pdfIn PDF document text
    • https://penoruzeni.weebly.com/uploads/1/3/4/1/134132400/dejivuxiruguta-rakig.pdfIn PDF document text
    • https://nusimilanagazi.weebly.com/uploads/1/3/1/4/131454102/xevirakutasej.pdfIn PDF document text
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/sosodapawez-puwozij-vanikezunex.pdfIn PDF document text
    • https://cdn.sqhk.co/desiketomasu/ihghgig/popezisubom.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/90795408310.pdfIn PDF document text
    • https://cdn.sqhk.co/jopuromug/ehgAidV/how_to_slice_potatoes_in_kenwood_food_processor.pdfIn PDF document text
    • https://fuwexizadosilu.weebly.com/uploads/1/3/5/3/135318643/gunij_xasexamamabupo.pdfIn PDF document text
    • http://xesesevatep.22web.org/senibutik.pdfIn PDF document text
    • http://bulepozobagepud.mygamesonline.org/cricket_score_sheet_a4_size.pdfIn PDF document text
    • https://vijunefuk.weebly.com/uploads/1/3/4/5/134588972/lejidoge_femuta.pdfIn PDF document text
    • http://padlamadla.site/soxen7jwj4.pdfIn PDF document text
    • http://tameenegypt.com/exemple_attestation_suivi_de_formationqw2ov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://motiwop.rf.gd/dajosowazuragozujakuzidel.pdfIn PDF document text
    • http://kewevagisugimuw.onlinewebshop.net/arithmetic_progression_question_bank.pdfIn PDF document text
    • http://wewepov.rf.gd/before_after_grammar_worksheet.pdfIn PDF document text
    • http://nozixexegaliwe.rf.gd/grammarway_4_with_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000350a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x350A2 48580 bytes
SHA-256: 6f00925cecb498d96f39b8913c9f2361eb30b64c3be913818909c0419aa52639
font_01_sfnt_off0003e337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E337 5664 bytes
SHA-256: 7f1dc65ab2c36cee23efe509341931fafb3af45916bf9719479e20b89125ddc4
font_02_sfnt_off0003f681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F681 13012 bytes
SHA-256: 5831329c12028926c258fae4640b417b66f8cf61c7dbda0b26c702050a2ea5fe
font_03_sfnt_off00042135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42135 16272 bytes
SHA-256: 645628e93b474d0691002d1dfe20ee42d8a731f91551785d7ab2d763efcd9c15

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