PDF malware analysis — malicious · b0379cfb9379c05e

MALICIOUS

PDF

102.7 KB Created: 2021-06-03 11:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: 2365bec043b51555b499f6a6f504099c SHA-1: e7cdbfc9c3ed5723dc324e93797c43121ef3cbca SHA-256: b0379cfb9379c05ee9f1536ad0cb42bb7cb94b1537ec20bf46ecf57b82299347

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF that contains numerous external links, many of which point to other PDFs. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates that the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://philabc.ru/pbw?utm_term=arch+linux+manual+pdf PDF link annotation
- https://static.s123-cdn-static.com/uploads/4479902/normal_5ff4d3a4771e0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4443598/normal_605c6436b8edf.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4487208/normal_5fe41f472393b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4369323/normal_5ffcf7725673c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409246/normal_603c80dc9350e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4366344/normal_5fee2693f2749.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4459165/normal_601855ba251ff.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4445541/normal_5ffa1c6f6fdf7.pdfIn PDF document text
- https://vumetubav.weebly.com/uploads/1/3/0/7/130776444/resutavedavelij.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4484805/normal_5fd7eda421deb.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4369762/normal_6007c70a83a72.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4469630/normal_5fc86b08c2e14.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4402533/normal_5fd22e2d4cfd8.pdfIn PDF document text
- https://dewixazupeteti.weebly.com/uploads/1/3/1/4/131455636/5428219.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/3bfd9f91-8fad-435a-b196-fdd1c2cb42a4/7688914008.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e5e37b3f-6e49-4b19-b9ff-f73f14114677/personal_development_plan_examples_for_executives.pdfIn PDF document text
- http://viluxese.pbworks.com/f/new_construction_final_walk_through_checklist_template.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/868e06ad-7df6-4d0c-abee-13200f9f6db6/bosch_dishwasher_mounting_bracket_amazon.pdfIn PDF document text
- http://zopujoxobug.pbworks.com/f/zunomi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/11e1fbc2-3043-4f1a-bd34-805577828a77/66808532102.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cb40b2e8-2a6d-46d6-891a-12d480c3d561/xokaduzexepekerog.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_off00012ebe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12EBE	5276 bytes
SHA-256: `097ff022d509881dc93b1fff0af3c4af4678ece1736c0d0dd6c3d1779553e2c4`
`font_01_sfnt_off00014083.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14083	3452 bytes
SHA-256: `9108f549995c4bf38748a21ce996a93718903d5d3e6d39ecabe0e055e0322ac6`
`font_02_sfnt_off00014e62.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14E62	12168 bytes
SHA-256: `7ec9592b859f017fcee38298cce9aba530229769b465267f6c7f057090dc2fdc`
`font_03_sfnt_off00017634.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17634	16208 bytes
SHA-256: `f76e53b1165c770ea72ceccb5e808e1d48d2b426d0b5e274530350a00bad707e`

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