Malicious PDF — malware analysis report

Static analysis result for SHA-256 f82316abe123f036…

MALICIOUS

PDF

67.6 KB Created: 2021-03-03 12:22:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 147a2a0845ec7f37631de4fb0895dd1c SHA-1: 01d572cd3f33db75b0ac6b2a9dddfe4687b5ddb3 SHA-256: f82316abe123f0369513ca26e9fa7bcd9d4865923fbfc61d7224722495b1d965
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be related to car maintenance, likely serving as a lure. The presence of embedded URLs and the ML classifier's high confidence score further support the malicious classification.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=how+to+turn+maintenance+required+light+off+2000+honda+accord In PDF document text
    • https://cdn.sqhk.co/jigavozef/ggijzrI/xirijomewabifolesimedaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469143/normal_5ff9b7afdbc17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404515/normal_5fec84ec08ffb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446275/normal_5fe743e3bd987.pdfIn PDF document text
    • http://mareson.getenjoyment.net/the_art_of_loving_erich_fromm.pdfIn PDF document text
    • https://cdn.sqhk.co/nexuliwadi/Ly1jhge/biwevotodesujozumobukifim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467274/normal_602e990ec2431.pdfIn PDF document text
    • http://balonedud.iblogger.org/besadoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495265/normal_600f63165a5b0.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/hcgggey/genajugodujero.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fipabazubigu.rf.gd/78418028496.pdfIn PDF document text
    • http://ziwibavufu.rf.gd/xalogapimabusawes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF6 5592 bytes
SHA-256: b34a803ad56da4862c57c756a32633404942a9e357c9c66e4ebd2fd4014b624f
font_01_sfnt_off0000d1cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CD 9780 bytes
SHA-256: 7d9c75db5d3c461e4e1864e4c902e4af467986f41e6d7bf1a1900a0d0f82fc32
font_02_sfnt_off0000f347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF347 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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