PDF malware analysis — malicious · 399fca044bb31229

MALICIOUS

PDF

76.2 KB Created: 2021-06-07 08:27:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 3b377cf479eb0c71502ba18474647f9e SHA-1: a44835ad7c83155b97babeff4295905fb97d5a6c SHA-256: 399fca044bb312297ce31655e3f449398ea3cb028a70a0b5fc2c3117c24f2b76

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.8609

Heuristics 4

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.
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://wastran.ru/pbw?utm_term=transition+words+sentences+worksheets PDF link annotation
- https://static.s123-cdn-static.com/uploads/4410217/normal_5ff1e3e7c7dc2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418579/normal_60281d57736f0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367624/normal_60415d0649804.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420239/normal_60b806447a9a6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4455886/normal_6046002db169c.pdfIn PDF document text
- https://lufotoloxa.weebly.com/uploads/1/3/4/3/134318907/1a88be6a5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4467036/normal_602982dd91684.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375203/normal_6041e2000c10c.pdfIn PDF document text
- https://nanupubixo.weebly.com/uploads/1/3/0/9/130969545/7802762.pdfIn PDF document text
- https://nurixuwabojud.weebly.com/uploads/1/3/4/5/134587723/mojot.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4456728/normal_606e3058acf42.pdfIn PDF document text
- https://guduzuzej.weebly.com/uploads/1/3/1/6/131606672/5e6f4c3738b8.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/3a0523a9-b83d-4c92-91b2-91a568c7c3aa/81425553203.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/953c4787-84b5-4313-88b2-5a2100512f4a/curriculum_vitae_formato_para_rellenar.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/01436137-3c4d-4738-84d7-9b198043c0fb/how_to_program_vector_to_talk.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/db181831-2525-4b67-bc0b-c3c54d43da17/the_infancy_gospel_of_thomas_full_text.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f3f4d8f4-3797-4061-9cc1-0e5f37e35b53/26402386826.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b124fae7-43a6-4609-a3af-897c0938f149/90847751010.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/035d28bd-7a01-46c3-b4a4-7350a573a5b2/how_often_does_gamestop_restock_consoles.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6964a53a-e127-46f3-84c9-2919f3edc190/bibopilejorinaxakax.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/db5965fb-fe8b-4cc6-b173-b7bcf19e05b1/ashab_e_kahf_in_urdu_part_14.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8f10affe-b17f-4d08-8308-61eb8cbc0df8/34844177536.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_off0000fee7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEE7	5100 bytes
SHA-256: `d4ef0d915d65cc527a02e55d82b04063634f75e1ddcb92bc5324a3453d4d785f`
`font_01_sfnt_off00011049.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11049	10568 bytes
SHA-256: `2bd63fc3c43b189e262fca9de2cc229d088c4bf3cebd990d94b4e429ab41ca2c`

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