Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ca3b3c6beb13ab…

MALICIOUS

PDF

83.6 KB Created: 2021-03-18 14:04:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2617bee8fdbe82b4e36da49381b30a41 SHA-1: 1fcfb75561cc6f77195d97fc27a6a44ea9548f99 SHA-256: b0ca3b3c6beb13abb8cafdeb11c78420373cfedb643897c8fe631aea472ccc44
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this. While no scripts were explicitly extracted, the nature of the link farm and the malicious verdict suggest it may be used to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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 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://ponafet.ru/aws?utm_term=don%2527t+look+back+gospel+song+lyrics
    • http://voiprormul.xyz/the_chronicles_of_narnia_the_lion_the_witch_and_the_wardrobe_full_movie_free_download_in_hindim4b1a.pdf
    • https://waruzakelejabu.weebly.com/uploads/1/3/4/6/134600446/fuzoxidinijoba-woxovowil-nazizuz-xedowo.pdf
    • https://cdn-cms.f-static.net/uploads/4410217/normal_6042c37e1df4c.pdf
    • https://tipozuroboga.weebly.com/uploads/1/3/4/2/134265922/felutevogo_kawitodo_posato_telodamox.pdf
    • http://pedaropira.22web.org/36984336624.pdf
    • https://cdn-cms.f-static.net/uploads/4454694/normal_5fdc354d03302.pdf
    • http://uaregroup.com/what_are_covenants_in_dark_souls_343nap.pdf
    • https://xasufedi.weebly.com/uploads/1/3/4/6/134683860/zunun.pdf
    • https://bafumujem.weebly.com/uploads/1/3/4/4/134498711/lexafuv.pdf
    • https://static.s123-cdn-static.com/uploads/4383916/normal_5ff7d223bda85.pdf
    • https://cdn-cms.f-static.net/uploads/4409098/normal_600e570ba9dc5.pdf
    • http://xidufekaposepun.iblogger.org/katuzepujovuwunidape.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c5887737-2630-484e-876b-37a6ec30c843/how_to_program_logitech_harmony_650_remote_control.pdf
    • https://6a9ecc2b-05c3-4056-8705-773ae6be8cdd.filesusr.com/ugd/7a359d_33edcdc16b274be5a097a8efb3a6f3ef.pdf?index=true
    • https://20128683-61eb-4207-b985-d468b1a81fea.filesusr.com/ugd/0049ca_40cbed27c9de456997aa58ab7b8f2cc7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c443737a-c572-45da-944b-ded9abc480f0/tivomudodakumejivavi.pdf
    • http://votunekawajobo.rf.gd/29305691681.pdf
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_a5ca91c646904f2fa8c7f26d4f0b417f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/db0d6c28-3f7b-4c2e-9f46-69959f91b9ff/mn_motorcycle_permit_test_study_guide.pdf
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_408738051f35452893a3cbedc38ab414.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001088f.bin
a397bee88717a21ef7c45c6de1b47ca6e41c8727bc985d3947d321bb41348b26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1088F 5440 bytes
font_01_sfnt_off00011b33.bin
c822d1b64826cfd41298232aa6d60827f77751aa8e176af91d6867e8948d02b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B33 11176 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.