PDF malware analysis — malicious · 8630c84802df91eb

MALICIOUS

PDF

77.1 KB Created: 2021-05-30 20:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 633cd6ee9024852c6ca471bcffe5aabc SHA-1: 5cac9c5047616b2a959125b2e1885c94563a59dc SHA-256: 8630c84802df91eb378e3fe197e2d48cdeae13633a6ce5dcaab613d5d6977e65

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a common tactic for phishing or SEO spam. The ML classifier and ClamAV detection strongly indicate maliciousness. The primary external link, 'https://vilenefex.ru/strik?utm_term=why+is+my+maytag+washer+not+starting', suggests a phishing lure related to appliance repair, likely leading to a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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.
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://vilenefex.ru/strik?utm_term=why+is+my+maytag+washer+not+starting PDF link annotation
- https://cdn-cms.f-static.net/uploads/4469852/normal_6011a5c1ced67.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386851/normal_60664e5be56cb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4468823/normal_60596a75ca9d3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4443292/normal_60582caecba03.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4479691/normal_5ff8a11415c8a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4421957/normal_604f1c2f31118.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4478961/normal_606a5198c0c82.pdfIn PDF document text
- https://buduruzuled.weebly.com/uploads/1/3/2/6/132682090/1010920.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470533/normal_6056d6521ebac.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4486765/normal_6022a8ea452d6.pdfIn PDF document text
- https://jozeturibunoza.weebly.com/uploads/1/3/4/4/134491641/3224779.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4412195/normal_5ff11224990a8.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/4ab17943-c6eb-48b6-a8cc-a90d990877ee/baby_cache_chantal_crib_instructions.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ddc9bca3-9d8a-4056-bbaa-e3ddfbbaf00b/vox_ac30cc2_blue_alnico.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bfbf795e-44d0-4fce-912f-47265ce5cfd0/how_much_is_robert_oneill_worth.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/28978328-4493-487f-b7f2-054cb48fab78/gipolunumupotipasu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/660351ff-eaad-4d48-9f51-92d85d2a68ef/death_run_3d_unblocked_games_77.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b1607064-f45c-40e4-9152-cd06868ce900/crib_wars_rules.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4bdf4e65-554a-49ae-9b1e-e76489d1c4b7/24418097920.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8b9d04ef-4778-42c1-8362-43dd5b6e6c63/amana_microwave_convection_oven_countertop.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b4ee29db-9da4-43fe-a2af-826a00726548/26838226748.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6aeeffbe-9984-4157-92ba-e7e4146aa82f/how_do_you_prove_trigonometric_identities.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f0bc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0BC	5276 bytes
SHA-256: `99dccd57bd079f320f3a873d6d1143a3adcb2507c820adc0f009904cd2a9252f`
`font_01_sfnt_off0001029d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1029D	10468 bytes
SHA-256: `4edda5a70f25de2f78ef8880f11a6aeab96290ea7ae3ffbc0f1bbd4feac545bb`

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