PDF malware analysis — malicious · 01895c97a158be88

MALICIOUS

PDF

68.3 KB Created: 2020-11-21 12:26:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a9b8a92d17d872b13e5865f936f038e3 SHA-1: 7e6496396f7a9e5f63b380c7f1f562a0bcf95f0d SHA-256: 01895c97a158be883f3cd74b73b748002a8c609f4f7bd887179c6cd7b3885626

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, a common tactic for SEO poisoning and phishing. The primary URL, trafffi.ru, is suspicious and likely leads to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

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
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://trafffi.ru/123?utm_term=which+musical+features+the+song+ol+man+river
- https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/cc7667f25358.pdf
- https://tatabano.weebly.com/uploads/1/3/4/8/134850833/dee757272.pdf
- https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/07c5dacf7.pdf
- https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/51968.pdf
- https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/dobogejawizil.pdf
- https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/kuwekewugi.pdf
- https://tesewipelevifiv.weebly.com/uploads/1/3/3/9/133997178/2bbbe99c41070d8.pdf
- https://kelipibefis.weebly.com/uploads/1/3/4/5/134500531/waxas_laworugagali_dosozex.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://uploads.strikinglycdn.com/files/79104472-4a48-4f1f-ad6b-097f99326e69/biology_12_the_cell_review_worksheet_answers.pdf
- https://uploads.strikinglycdn.com/files/f233a231-8eff-453b-a146-6729d8efbfff/tazedepefet.pdf
- https://uploads.strikinglycdn.com/files/e3470f92-9c8f-4df0-8208-9e45e833a3f1/45577377093.pdf
- https://uploads.strikinglycdn.com/files/a761fdfe-2d11-474e-b96a-0733bf3680f7/52296456403.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_off0000cf14.bin` `07bbccc2aca9b3c38f766ce53d916f0259a78c7626d886e92e2852f07f5421e4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF14	5368 bytes
`font_01_sfnt_off0000e144.bin` `96417c6e799e61c219f8853650df54b629869c9f2325ee6558e03fc128350aeb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE144	10352 bytes

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