PDF malware analysis — malicious · 257492c092af7991

MALICIOUS

PDF

69.3 KB Created: 2020-11-24 08:51:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 6d775eec79bf7e5bef59286e079fa5d5 SHA-1: 1e5fcf761c925e57d774ea33567f6bdc2f734bac SHA-256: 257492c092af7991f8b30bde78fa0e424eb9ce77fc3abc23c0a976806ab1d27c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, with one pointing to 'traffking.ru', indicating a potential link farm or phishing attempt. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The embedded URLs suggest an attempt to redirect users to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/aws?utm_term=liquid+template+c%2523
- https://kileligujet.weebly.com/uploads/1/3/4/4/134457719/vegafavojowipe.pdf
- https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/digokasawuj-jipamuputevuf.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://uploads.strikinglycdn.com/files/fd2e3016-67d2-46c5-a9cd-e2427e0be807/54153158239.pdf
- https://s3.amazonaws.com/wujapu/irish_flute_music.pdf
- https://s3.amazonaws.com/xeropizuwe/brokenness_aside_free_piano_sheet_music.pdf
- https://s3.amazonaws.com/towakog/iron_block_minecraft_ps4.pdf
- https://s3.amazonaws.com/vovopafubipu/ashbringer_hidden_artifact_appearance_guide.pdf
- https://uploads.strikinglycdn.com/files/b9372431-2032-410e-96d3-f5903659f9c8/88790686681.pdf
- https://s3.amazonaws.com/wilugugo/31222773645.pdf
- https://s3.amazonaws.com/perurulexi/cookie_clicker_garden_seeds.pdf
- https://uploads.strikinglycdn.com/files/0469d652-ca60-40c8-bed7-df119782b622/94019088975.pdf
- https://s3.amazonaws.com/jozetej/1764431968.pdf
- https://s3.amazonaws.com/lezopobigeza/ad-_aware_spyware_remover_free.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_off0000ce99.bin` `3f1fa179ff2a028a795153d3ae9d6becda99088a29c80aa414a0d87eb4756704`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE99	5012 bytes
`font_01_sfnt_off0000df91.bin` `f573eb3d5409a97355f0302f8d2e82a5479b763960b375ecde8622da00fca4b9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF91	12740 bytes

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