PDF malware analysis — malicious · 5afa5c726c59ab89

MALICIOUS

PDF

71.9 KB Created: 2021-06-02 02:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 8d1304f3f02a3d44c094271e1e65a662 SHA-1: e73f37f94ba5c24e07c16f18d8f23e183c9073d9 SHA-256: 5afa5c726c59ab894555ea4396337b7aa5968019d01452bed4ff3f3cd1506e2f

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, identified as a link farm, with one prominent URL pointing to a page related to a deceased classmate's funeral. This suggests a social engineering tactic to entice users to click. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.8129

Heuristics 4

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://queure.ru/pbw?utm_term=deceased+classmate+funeral+resolution+for+a+classmate
- https://cdn-cms.f-static.net/uploads/4406785/normal_5fdae8ec38799.pdf
- https://static.s123-cdn-static-d.com/uploads/4408993/normal_60b3b8bb1cf8a.pdf
- https://vanunogagasibe.weebly.com/uploads/1/3/5/9/135964710/0cbd5.pdf
- https://cdn-cms.f-static.net/uploads/4496585/normal_6046f10675b32.pdf
- https://sirukume.weebly.com/uploads/1/3/0/8/130814715/65b67adc20187e.pdf
- https://sixanatol.weebly.com/uploads/1/3/4/6/134631849/zopatafusibudew.pdf
- https://static.s123-cdn-static.com/uploads/4373788/normal_5ffc7b5c460fa.pdf
- https://cdn-cms.f-static.net/uploads/4477408/normal_602d3f6dc9c67.pdf
- https://static.s123-cdn-static.com/uploads/4384145/normal_5ff474b6379f3.pdf
- https://static.s123-cdn-static.com/uploads/4478125/normal_5fcd5ff5011fa.pdf
- https://static.s123-cdn-static.com/uploads/4476274/normal_5ffebeb1c8f33.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://uploads.strikinglycdn.com/files/48f4539b-8438-4640-a07b-37255bd75c5a/nisexizanofuzav.pdf
- https://uploads.strikinglycdn.com/files/d50ba943-ca4e-41a2-899c-98026f272201/hp_designjet_500_42_inch_trailing_cable.pdf
- http://tisowowuduwe.pbworks.com/f/bally_5000_plus_slot_machine_manual.pdf
- https://uploads.strikinglycdn.com/files/a0eff92d-5142-4f73-a1a6-9a7e382e4abb/duvarlarin_dili_olsa_2_turkce_dublaj_izle.pdf
- http://wojipag.pbworks.com/w/file/fetch/144413640/24103315903.pdf
- http://dipoziw.pbworks.com/f/33543404485.pdf
- https://uploads.strikinglycdn.com/files/80a3b8e5-2f8a-41a4-a49a-300249389110/el_monstruo_de_colores_actividades_preescolar.pdf
- http://sipibujewadu.pbworks.com/w/file/fetch/144483546/download_plants_vs_zombies_2_hack_cho_ios.pdf
- https://uploads.strikinglycdn.com/files/772bf9be-1b86-4e9c-b845-2685c378f1a0/25528539168.pdf
- https://uploads.strikinglycdn.com/files/e6d36a6b-9136-40ea-9580-dac8280ec0fd/lejimitatowuzobib.pdf
- http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f77e.bin` `e64c8a037b6fdc8915b942d17bcebe64aa8ee5e826c52793c917febadc6fe8f2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF77E	5168 bytes

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