Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4d24f08479ab686…

MALICIOUS

PDF

67.7 KB Created: 2021-03-04 05:48:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 4106713b78e0fec3555b26575f9d4f13 SHA-1: 024ac67edcc06a1cf79db0c282566524d1a6e189 SHA-256: f4d24f08479ab68663edeb58fb6ab9f656d24fe096b963f37a605e14f919e703
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one identified as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=what+time+does+maggiano%2527s+close PDF link annotation
    • https://xedatuvigino.weebly.com/uploads/1/3/4/5/134580066/60352442276.pdfIn PDF document text
    • https://cdn.sqhk.co/xajamenujo/d4uYie1/race_tomorrow_nascar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sowukosififu.rf.gd/bibliography_apa_and_mla_format.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/supadeduluranasenuk.pdfIn PDF document text
    • http://zenowalu.rf.gd/93472827265.pdfIn PDF document text
    • http://mufifofoge.epizy.com/four_4s_answers_1-_50.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/what_color_should_blood_be_after_abortion.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/how_much_is_a_nintendo_ds_lite_in_the_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/jezadiwuxiwexunep.pdfIn PDF document text
    • http://jujovotusenugo.epizy.com/aerodynamics_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/rewibum.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/pizza_party_invitation_template_word.pdfIn PDF document text
    • http://momalovategur.rf.gd/24845081897.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_off0000cc1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1D 5304 bytes
SHA-256: 22e62363fd25fea1f56c1396e13977ee51ea3a82d296abe574a9cb76d16b2349
font_01_sfnt_off0000de18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE18 10508 bytes
SHA-256: 1cccff339713b96462b26d0e50ff362d4ff6e5dd60c9dd324a7a89fb72319037

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