PDF malware analysis — malicious · dbb098a36061e041

MALICIOUS

PDF

89.2 KB Created: 2021-05-24 16:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 251c76a85b7311e7be159dd8fca92e3f SHA-1: 3e131b93de92452f76b76feea2d2e4c064b0dd3a SHA-256: dbb098a36061e041f4ecae541101113784713c7cc6162089f58083b3ea2b181d

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, appears to be related to a manual, likely a lure to direct users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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
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://golowaki.ru/strik?utm_term=all+in+1+hdd+docking+model+875+manual+espa%25C3%25A3%25C2%25B1olo PDF link annotation
- https://cdn-cms.f-static.net/uploads/4407804/normal_605d7ec660c54.pdfIn PDF document text
- https://fomodaduvi.weebly.com/uploads/1/3/4/7/134700625/lumux.pdfIn PDF document text
- https://wuvumivew.weebly.com/uploads/1/3/1/4/131410662/943150.pdfIn PDF document text
- https://pawizujepus.weebly.com/uploads/1/3/1/6/131637171/nesojitofepaji_betovarovebe.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4501374/normal_60303234a3746.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366622/normal_602fce410aac5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4473064/normal_6003afb4b14d6.pdfIn PDF document text
- https://lugewulisafope.weebly.com/uploads/1/3/4/3/134311751/soladuvo-kizogitu.pdfIn PDF document text
- https://dasatupulike.weebly.com/uploads/1/3/4/1/134131314/7002374.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409420/normal_6037a5c049c2b.pdfIn PDF document text
- https://xesolisozewil.weebly.com/uploads/1/3/1/3/131379689/kusolamewusifesovebe.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4491412/normal_606e70c5dbbca.pdfIn PDF document text
- https://pabarubuvu.weebly.com/uploads/1/3/1/3/131379718/gebuwotubet_buvoweripekob_lezej.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/c983e8f5-eb55-4966-bf42-aba9fdcb34d4/american_gods_trailer_season_3.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e1107458-e67d-4788-b01f-26ed751a7ea9/wogasifuva.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/63624549-5da8-43b3-b9ca-eb8f51550112/39973695268.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f1c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1C1	6084 bytes
SHA-256: `9c1791146447933711efd73966f6e9ee4feaae7ac9699bf01719f895e9853099`
`font_01_sfnt_off000105ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105BA	11028 bytes
SHA-256: `84170c9bdda36c434faaad4fcd745f55ad5af100d4cb3ef664573eb7022d1d29`
`font_02_sfnt_off00012b32.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B32	17840 bytes
SHA-256: `cfa154fe63e42e60d620059edf589e579c9aa892ce0a6f633b9b6471d3732f35`
`font_03_sfnt_off00014626.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14626	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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