PDF malware analysis — malicious · 3a0fc576433f12c4

MALICIOUS

PDF

87.2 KB Created: 2021-06-12 23:40:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: bda4530f07342f4c50a50791e585c8e0 SHA-1: c84692a4f0fce2c2a4059a4e9ddc5a034f0fcb79 SHA-256: 3a0fc576433f12c4e4e2663bb30002554704d6b41471102b2f089025e3f49ba8

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'Gta online character creation tutorial', likely to entice clicks on the embedded malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9981

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://krisoc.ru/pbw?utm_term=gta+online+character+creation+tutorial PDF link annotation
- https://tasuvomodibep.weebly.com/uploads/1/3/4/8/134887436/mujemikud.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4448115/normal_60bfb64c08b93.pdfIn PDF document text
- https://reninifovebomul.weebly.com/uploads/1/3/4/3/134361606/puperumo_mikedevejodod.pdfIn PDF document text
- https://juzefujuninolu.weebly.com/uploads/1/3/1/4/131438825/tatilar.pdfIn PDF document text
- https://jijemelagif.weebly.com/uploads/1/3/4/0/134016961/1554379.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4454691/normal_60afe4a882d72.pdfIn PDF document text
- https://savatevadenu.weebly.com/uploads/1/3/1/4/131452836/b0a24c616b.pdfIn PDF document text
- https://wawukonuxoni.weebly.com/uploads/1/3/4/0/134095992/wawifegotenovux.pdfIn PDF document text
- https://xinefozi.weebly.com/uploads/1/3/0/7/130775465/4459e139019f.pdfIn PDF document text
- https://bumilumijoxaxuv.weebly.com/uploads/1/3/4/4/134497753/mavibeje-fexuduwumapi-bukikenaviwab.pdfIn PDF document text
- https://laxatutokowo.weebly.com/uploads/1/3/5/3/135387201/bf738ab925fb.pdfIn PDF document text
- https://ditiboxoteripu.weebly.com/uploads/1/3/4/7/134763901/0444433b8cb03.pdfIn PDF document text
- https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/rawuxemiligamikogado.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377113/normal_5fdae9b50fed0.pdfIn PDF document text
- https://bexipame.weebly.com/uploads/1/3/0/7/130776855/e1fe0985ffcd8.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4413578/normal_5ff19bdd98844.pdfIn PDF document text
- https://jivafizet.weebly.com/uploads/1/3/4/7/134743279/mimorutoneforo.pdfIn PDF document text
- https://dametubidino.weebly.com/uploads/1/3/1/3/131383661/8735321.pdfIn PDF document text
- https://poriveba.weebly.com/uploads/1/3/4/3/134316211/ripilefixus.pdfIn PDF document text
- https://vanuvinuvur.weebly.com/uploads/1/3/0/9/130969573/kevijuburopeso.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/903662a4-db4c-490c-b044-4cc16af279e3/bridge_to_terabithia_book_summary_chapter_4.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b0681280-b67b-40aa-807b-6b4e4e6ef3fa/37815269689.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f45a889c-712a-49a0-a075-061a252076e5/sisesosusitegivifugu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a760a9a6-e7a2-45c7-b0ce-09949cba01eb/cuando_sueas_que_tu_pareja_te_es_infiel.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_off0000f442.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF442	3208 bytes
SHA-256: `7f29c92f26eb54fa28bc16636df30fa467b10e89aa608849e5e3ad6743e24576`
`font_01_sfnt_off0000ffb1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFB1	4740 bytes
SHA-256: `8a84f075bef1d89d5c3ca730450416cdd479eae6442d79fdf3be4e45216ee5a5`
`font_02_sfnt_off00010fc6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FC6	11616 bytes
SHA-256: `7e618f68181d45e0a22fafe1389e00445681acf0da100faf2949aa760aa9c058`
`font_03_sfnt_off0001379b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1379B	16060 bytes
SHA-256: `df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210`

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