Malicious PDF — malware analysis report

Static analysis result for SHA-256 b10f618a25c7e978…

MALICIOUS

PDF

71.8 KB Created: 2020-12-18 11:03:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc658ae00d8c84e9697a0ffc7772cdc7 SHA-1: 74bd142e2a6e7a017d856c90da0aae32688b0f17 SHA-256: b10f618a25c7e9784296976df34cfad7906c721d5bc8d5adadb496a2454bfa57
96 Risk Score

Malware Insights

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

The PDF file contains a URL that mimics a search result, likely intended to trick the user into clicking it. 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 URI heuristic suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/strik?utm_term=bead+storage+containers+hobby+lobby
    • https://cdn-cms.f-static.net/uploads/4393356/normal_5fb3e3c07909c.pdf
    • https://puvovajol.weebly.com/uploads/1/3/4/0/134040332/804049.pdf
    • https://cdn-cms.f-static.net/uploads/4386087/normal_5fb4e2f12c40b.pdf
    • https://cdn-cms.f-static.net/uploads/4448743/normal_5fb81b89cd254.pdf
    • https://pudijeda.weebly.com/uploads/1/3/4/5/134586696/navub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jivamubug/tuvajitogonorezexixe.pdf
    • https://uploads.strikinglycdn.com/files/f1095790-d227-4858-b065-bdfa737f22a4/18659679403.pdf
    • https://s3.amazonaws.com/fonazuzixagizir/3444040293.pdf
    • https://s3.amazonaws.com/jasadavebaga/horror_music_sound_effect_free.pdf
    • https://s3.amazonaws.com/dotivaf/12th_class_half_yearly_exam_date_sheet.pdf
    • https://static1.squarespace.com/static/5fc4c5dcbd14ff0dd2b57a68/t/5fcab5c60ae9f772cdf86b2b/1607120326845/kuxabobib.pdf
    • https://s3.amazonaws.com/lurutopobi/favizuxewagaxodexobup.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d98f.bin
a7b7b322a7cc07a0035076cb3722bea7925fa55327b1d9fcbebe37a6acd55f9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD98F 5492 bytes
font_01_sfnt_off0000ec3e.bin
1d1d469d1479dedf833aa6c60b4ce07053381675295a97a28cf14823c0500579		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3E 11536 bytes

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