PDF malware analysis — malicious · 2b2e412f1fbb4397

MALICIOUS

PDF

77.4 KB Created: 2021-03-26 08:47:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 2e96a424d706342b80f19ab424191ce6 SHA-1: e3b9482d95c2669fc13a182c223b30808f303ef0 SHA-256: 2b2e412f1fbb439713f44cc462a7b2d111ff6647347d79047f1df0cfe208bbff

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, which is not inherently malicious but can be used to create deceptive documents.

Machine Learning

Nyx PDF Classifier malicious score 0.5958

Heuristics 5

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 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.
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.
External URI info PDF_URI

PDF contains an external URL action
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://xezojetit.ru/award?keyword=akai+mpc+4000+manual+pdf PDF link annotation
- https://static.s123-cdn-static.com/uploads/4449793/normal_6004cc01f27f3.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4447649/normal_5fc666a1c3ce1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369327/normal_601a3c9ba661e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4473640/normal_601966a166f22.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4467586/normal_5fe9f5e4e2dcb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4483103/normal_60226177690ab.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4426812/normal_601f195b31a59.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454426/normal_600be5ebb7131.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382972/normal_5fe8e08cddd46.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/3f447b9c-2e07-484d-b264-f9f455d8f7aa/jekodorexawomar.pdfIn PDF document text
- https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_719aa02b938140528624ff6010b46242.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/0e33ce82-db4e-4c9e-bf4c-083412e151f0/easy_veg_recipes_for_dinner_indian_list.pdfIn PDF document text
- https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_403231cbe3864028a02ab05e6b61be5d.pdf?index=trueIn PDF document text
- https://7e073981-ad1c-4081-8dc0-76946ba36063.filesusr.com/ugd/c4f63d_69bb823b25ca41ea8ea6719bdfecd839.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/77cc4cc9-1e17-47b4-8300-67c9fb6a0851/23407137961.pdfIn PDF document text
- https://55afd15b-9a96-48ff-beb6-d705f4765584.filesusr.com/ugd/8b06a9_b3d4979ebde14a6da7d7c1a5127b53ec.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/63d0f37a-086c-4b6e-a695-be2bb3519b7f/fazujejeminedanuk.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/42e87e32-5b3f-4202-8456-b00fb9019c0d/kinibewenabasi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/14ad270e-d0a5-4a96-97e9-90d9d9a09d46/why_is_my_typo_shower_speaker_not_working.pdfIn PDF document text
- https://9e0ebcba-7e04-41ac-afc6-cfc574163c15.filesusr.com/ugd/6725b5_96c6dcdc6dab4033a004a2b5dd06d2d1.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/a600118d-401d-4010-9e3f-cd008182fe56/8917080579.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2ba0539f-f077-4966-bfc0-3b6aeac605cd/how_to_connect_hp_officejet_6700_to_wifi.pdfIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f810.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF810	5312 bytes
SHA-256: `089563d6fa70efa7523209a4ad35a0465d15ded676d7dbcab639a96631956d90`
`font_01_sfnt_off00010a24.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A24	11476 bytes
SHA-256: `aa8c8c61c8e84a5689dbd90cfa4b96283c64f59725687126cd6130fcbcd2b25f`

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