PDF malware analysis — malicious · bff69e72a2770835

MALICIOUS

PDF

64.3 KB Created: 2020-12-16 13:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f52853f63cfcc6000f0ec789530ac681 SHA-1: d12bdbe257e4bc2d8e3b44c3ea374f33f16462a2 SHA-256: bff69e72a27708351f8125533bbb5c98c637aef15725434e6e4eba9adf73a857

214 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous external PDF links suggests a link farm or redirection strategy to obscure the ultimate destination, likely a phishing or malware delivery site.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

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.
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.
ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://traffmen.ru/aws?utm_term=balance+sheet+account+reconciliation+best+practices
- https://mivodijabid.weebly.com/uploads/1/3/4/7/134732330/foxotisinofuvin.pdf
- https://zorivaleguzovul.weebly.com/uploads/1/3/4/5/134596353/8050738.pdf
- https://gazisaki.weebly.com/uploads/1/3/4/3/134371182/6f161f1e387.pdf
- https://bizidijekivaza.weebly.com/uploads/1/3/4/5/134502856/8418692.pdf
- https://nowawizerazez.weebly.com/uploads/1/3/4/5/134519823/c4b4ca1a403e06e.pdf
- https://xavixikani.weebly.com/uploads/1/3/4/5/134502132/105385.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/minabiwa/video_editor_android_terbaik_tanpa_watermark.pdf
- https://s3.amazonaws.com/jeduzizonox/research_paper_example_apa.pdf
- https://s3.amazonaws.com/leguvefu/minecraft_dungeons_wiki_mobs.pdf
- https://s3.amazonaws.com/jedaxopopuko/47282027534.pdf
- https://s3.amazonaws.com/dowavelaxam/7029349220.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c0cd.bin` `3ca89b5718b97c782ae52367ddb1040563da9a1463d0e55b78b9775a2ea99654`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC0CD	5212 bytes
`font_01_sfnt_off0000d277.bin` `b799047d7738a072880223d1cfba6aceeba021e94fdb3bc723da16e68d557b17`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD277	9944 bytes

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