PDF malware analysis — malicious · b5e31da3b1563b80

MALICIOUS

PDF

102.5 KB Created: 2021-01-19 15:44:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05

MD5: dcd88c37b3759bfe9d4963344188d16f SHA-1: 35374ad8e8d47b6a131c52d300b696ab8f6f63ee SHA-256: b5e31da3b1563b80bd62e893f4513cdc807e9905b0b0a41897b5e2d4ab0674b4

244 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document functions as a link farm, embedding numerous URLs that lead to malicious redirectors and potentially harmful content. The ML classifier and ClamAV detection strongly indicate malicious intent, with heuristics pointing to a link farm designed to redirect users to malicious infrastructure. While no scripts were explicitly extracted, the PDF structure itself facilitates the attack by hosting these malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://cctraff.ru/123?utm_term=good+charlotte+the+anthem+album In PDF document text
- https://zitakusosexozi.weebly.com/uploads/1/3/4/5/134595565/ee5e4b77a45f8c.pdfIn PDF document text
- https://site-1252641.mozfiles.com/files/1252641/fogakolinifu.pdfIn PDF document text
- https://cdn.sqhk.co/tivuzofep/jft8Zqv/diamond_digger_saga_android_apk.pdfIn PDF document text
- https://site-1171987.mozfiles.com/files/1171987/formula_car_racing_game_2020.pdfIn PDF document text
- https://wawukonuxoni.weebly.com/uploads/1/3/4/0/134095992/wamejotijalitaf-zobemirutoripof-jedubovoxewufa.pdfIn PDF document text
- https://cdn.sqhk.co/kisesawaropo/ijhf82r/teboruremoxanorubujajew.pdfIn PDF document text
- https://mugokirupela.weebly.com/uploads/1/3/2/6/132681863/982d34bce5598.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4411218/normal_600237ab179fa.pdfIn PDF document text
- https://petobaxiteru.weebly.com/uploads/1/3/1/4/131407236/pominek-dovagalelesita-bakuvu.pdfIn PDF document text
- https://cdn.sqhk.co/jutafegobexe/jfjheKN/pc_games_to_play_with_friends_2020.pdfIn PDF document text
- https://cdn.sqhk.co/senagoxosog/giLIheH/xipekuwinizavesuxaxulegox.pdfIn PDF document text
- https://site-1176882.mozfiles.com/files/1176882/57880710093.pdfIn PDF document text
- https://cdn.sqhk.co/jamolipa/jjgjgvH/26850337709.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/jukezeluf/tijinidasupowokixujusevo.pdfIn PDF document text
- https://s3.amazonaws.com/xilasisefi/wobadatavenovisepagafo.pdfIn PDF document text
- https://s3.amazonaws.com/nuxepiduded/livro_de_cantos_liturgicos.pdfIn PDF document text
- https://s3.amazonaws.com/dudujopixejikug/dadaganazebinamuwe.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_off000146ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x146CA	2920 bytes
SHA-256: `214af57da0742dc166c9fae236394dc7a800ceb549b8d7ad4b915bb44e498b9f`
`font_01_sfnt_off00015123.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15123	5172 bytes
SHA-256: `123aa8e4f24f3e318820854cebcb191efc35372b5445ab119818bf3052705562`
`font_02_sfnt_off0001628f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1628F	13008 bytes
SHA-256: `08362141fcfb70ee88483ce91fd338276177facec79aa9df1efd7f7b84df5fae`

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