PDF malware analysis — malicious · 3d9a298c948c2ef1

MALICIOUS

PDF

71.6 KB Created: 2020-11-26 03:38:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bafe30c4db7bf73303310cf210da2bb7 SHA-1: d60ff75809dfeae825e4c455748f514c748ab50d SHA-256: 3d9a298c948c2ef1487c6dae6e2f7a45e4dc25e76ec50c50adbfd76b8c9601fc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a PDF link farm, suggesting a phishing or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of numerous external URLs points towards a potential redirection to malicious sites or further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

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://traffnew.ru/123?utm_term=business+english+pdf+lessons
- https://cdn-cms.f-static.net/uploads/4393035/normal_5f9b12abc4a8e.pdf
- https://cdn-cms.f-static.net/uploads/4448713/normal_5fb6d6d1489c8.pdf
- https://fimosezit.weebly.com/uploads/1/3/0/7/130775491/eb5a71ae5.pdf
- https://cdn-cms.f-static.net/uploads/4450345/normal_5fa990034fea3.pdf
- https://cdn-cms.f-static.net/uploads/4365525/normal_5f9de3ce72655.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://s3.amazonaws.com/wifukedot/rugokokamasasuvofifularov.pdf
- https://uploads.strikinglycdn.com/files/acd42a00-3f0a-4f4d-88ea-d4edc14cf203/72639211666.pdf
- https://uploads.strikinglycdn.com/files/32c49ef8-4945-45c5-a17d-7b7d9136d6a5/rimerexolirarusugegufuse.pdf
- https://uploads.strikinglycdn.com/files/9c642274-83e1-429f-b6a1-f8b5bcec5cda/fimidigesedafakegamobama.pdf
- https://s3.amazonaws.com/jujojomojemiz/launceston_tv_guide.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cf05.bin` `8362e1164faca70e3900df42e6fa2b2698658ff8db97bfe367209bf7ed9a7140`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF05	4848 bytes
`font_01_sfnt_off0000df70.bin` `027111af3e2bc2c8724476bfd569a89d383040e1242aec5b8624d77eebecc49d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF70	10692 bytes
`font_02_sfnt_off000103ee.bin` `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103EE	4324 bytes

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