Malicious PDF — malware analysis report

Static analysis result for SHA-256 f09e9d38099c6763…

MALICIOUS

PDF

82.3 KB Created: 2021-03-04 01:14:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 77a236ccbe6db2dfb141d984f56b167a SHA-1: 8c644fa1972aef30cc3706d81d50fdf1225a25b6 SHA-256: f09e9d38099c67630beacd3e26294dc02dc2cf763d79b3387a032bd45e876a7c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF that contains an embedded URL disguised as a free download link for an English to Gujarati dictionary. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple external URLs suggests the document is part of a campaign to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/strik?utm_term=english+to+gujarati+dictionary+pdf+file+free+download PDF link annotation
    • http://jikusofare.mywebcommunity.org/95457379500.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418188/normal_6033040ddeda0.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/rifErgg/kugefurudakowelid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483587/normal_5fe345cd478b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463266/normal_5fcb9e3a1f135.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/iayeege/70131752093.pdfIn PDF document text
    • http://zitugaxusi.mygamesonline.org/53127372930.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417983/normal_5fc88b6b3c62a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371023/normal_5fde581cd70a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413362/normal_5ffe8d8d7e923.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinipaz/eggwjhn/99033679133.pdfIn PDF document text
    • http://pidagenavuziw.mywebcommunity.org/motimekirax.pdfIn PDF document text
    • https://cdn.sqhk.co/burexewejam/hdqjfLt/759005027.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495402/normal_602fd2f9630b4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pojozija.onlinewebshop.net/samsung_tv_ln32b360c5d_manual.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/yongnuo_yn_560_ii_manual.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_off00010167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10167 5644 bytes
SHA-256: f324df449bf9c96569c5994c3a1687adf94006f2f96bd794ceac594b3c494f70
font_01_sfnt_off000114be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BE 11368 bytes
SHA-256: 0ce986967e4c7d1a65a6cbb31b057b029f75f8e0a33df80a92d5b82b68bba4b0

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