PDF malware analysis — malicious · 9fc6a8873ab98902

MALICIOUS

PDF

50.6 KB Created: 2020-12-11 07:45:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e5707384d1b6b6b2c36fe7982afdfe3f SHA-1: d9097a67440553e156cc1429551fd7e19fb0d2d8 SHA-256: 9fc6a8873ab9890285660143df57e8a622a5163122ccbecd669ea0d9eea69063

242 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to disposable hosting services and redirectors, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's used to lure users to malicious sites, likely as a phishing or malware distribution vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9648

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
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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=assetto+corsa+dtm+mod
- https://tunimesepet.weebly.com/uploads/1/3/1/4/131455680/fc197db436cd43b.pdf
- https://ledijomunekivi.weebly.com/uploads/1/3/4/5/134584754/bezuluzu_gilugesewafus.pdf
- https://kawepuwaseleza.weebly.com/uploads/1/3/4/8/134849925/kewakebixumiwafi.pdf
- https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/zagowomuzodaxuboka.pdf
- https://fuvepuzineg.weebly.com/uploads/1/3/4/4/134463404/a8e09bc5f9b.pdf
- https://cdn-cms.f-static.net/uploads/4492555/normal_5fb98981c6fb6.pdf
- https://gomosoganerat.weebly.com/uploads/1/3/4/4/134494513/3560009.pdf
- https://zovijewef.weebly.com/uploads/1/3/4/4/134400079/e276f4d7b7e4921.pdf
- https://static.s123-cdn-static.com/uploads/4412996/normal_5fc5e7cb1bb12.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/kijelopazekune/29236524110.pdf
- https://uploads.strikinglycdn.com/files/5c62ca0f-fc79-4f15-a18e-c3a8bb895cb9/11_x_17_gate_fold_brochure_template.pdf
- http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ab6d.bin` `dac1b5d9ede8f25770b344db8f13c86f60854277bddd7c43183daa784fa3f4b5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAB6D	5044 bytes

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