PDF malware analysis — malicious · 70504cc976aa66be

MALICIOUS

PDF

81.9 KB Created: 2021-04-30 01:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 1ea96e8e5df301665341905219e18a79 SHA-1: 918c2d1ea420475a3b1d255a51c3c28b9fc1c9a6 SHA-256: 70504cc976aa66be6837100b9d2e2bbe9bb50ef5f6d167023d5c0c4bf952eb3a

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

Heuristics 6

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.
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://jumiwimov.ru/strik?utm_term=the+magicians+season+5+episode+6+promo PDF link annotation
- https://static.s123-cdn-static.com/uploads/4481518/normal_5ff906d1d446c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453528/normal_603440c472422.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4422640/normal_604e0bae629f3.pdfIn PDF document text
- https://rogasiwenebagan.weebly.com/uploads/1/3/1/3/131380029/2612550.pdfIn PDF document text
- https://ronurakegilapoz.weebly.com/uploads/1/3/4/8/134852428/vizopos.pdfIn PDF document text
- https://likobikumenaf.weebly.com/uploads/1/3/5/9/135961418/3369455.pdfIn PDF document text
- https://vorupegesozuzow.weebly.com/uploads/1/3/1/4/131453293/928fe353f386da7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4401697/normal_6015414635d0c.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4451363/normal_5ff9789e06662.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450512/normal_6049de7482244.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420430/normal_604e8e8d63f1d.pdfIn PDF document text
- https://buginibonimej.weebly.com/uploads/1/3/2/7/132711973/4232028.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/48ca7d9f-c61c-4ea7-84d4-f32e63a09f53/xadomo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1fff52eb-e998-44ec-a71f-cd2f14922987/44541887817.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/38257525-e4dd-4077-a179-45a00f1559ae/can_you_get_knights_of_the_old_republic_on_xbox_one.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/072ad836-1a41-4817-830b-04733d6b8f68/cuantos_metros_tiene_un_estadio_segun_la_biblia.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7995feb1-eeba-42a3-aa55-2348379ab405/6726661379.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4f780ddd-c37c-4aa2-88a5-752bf88216e4/tc_polytune_3_mini_dimensions.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1cfe2e8a-bd36-4375-99bf-c8bcabe48220/tortilla_flats_arizona_weather.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/97b14d25-fac6-49ac-9bff-7d8bf7ed9200/55546364087.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3488e509-559a-424c-9adb-0fefa5427910/vocabulary_from_classical_roots_5.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/03dfe1f3-c0f3-436a-a78a-1e276d494d56/80453346142.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/aca13b3d-d482-43d4-a146-bde19acb63ff/which_countries_have_covid_19.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cf3653f3-b442-4231-b03b-c297525b5d03/91990744761.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f239.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF239	5392 bytes
SHA-256: `2acd09734d3b75cbed876cf5e75ec857e4b2d12ea146445e7fb9ae7023edf0b8`
`font_01_sfnt_off00010455.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10455	11204 bytes
SHA-256: `3bd0213dda71e8454b62a31c06b1cac630ef7ab5d93bccd3ea0abad9b4f4e89d`
`font_02_sfnt_off00012a5a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A5A	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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