Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2c1d11d6e6fc60…

MALICIOUS

PDF

90.7 KB Created: 2021-03-23 02:56:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a519baabb621d4c31f6b3fc60e668b5b SHA-1: bfda4fd707aa3a2e31a9a3a6cf40e73e6b6415a2 SHA-256: 0c2c1d11d6e6fc60f8db90d9841f8ee8ee05463b47b195a731c7bb7d064eacb8
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one pointing to a domain associated with link farming and disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware delivery. Although no scripts were explicitly extracted, the presence of embedded URLs and the heuristic findings point towards an attempt to exploit user interaction via external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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/wix?keyword=ymir%2527s+notebook+guide PDF link annotation
    • http://kinemulawaw.sportsontheweb.net/antecedentes_histricos_de_la_administracion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445564/normal_604a20d453060.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/fegakivajuzefuxemowelod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466398/normal_60387514dc330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409095/normal_602896fa16774.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418558/normal_5fe6c5103e21b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484126/normal_6044d7b9537a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457330/normal_601dd03e038ef.pdfIn PDF document text
    • http://gidilakapajuke.mywebcommunity.org/83779192680.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374517/normal_6009998c81d75.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/fd93d62e-81da-4272-87df-a27fc55f458e/horngrens_financial_and_managerial_accounting_the_financial_chapters_7th_edition.pdfIn PDF document text
    • http://satawakerexe.atwebpages.com/kaxibokig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ed23550-d0ee-4653-9fa7-f3301518dfa4/94586637037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4273c8b6-e3b7-486c-ba7f-bc07f0b56f28/visual_basic.net_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f0542c8-bc3f-455e-9af8-c2ace40db107/how_to_draw_proportions_face.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/768ef99d-e965-452a-b0ec-64d8eac935dd/char_broil_four_burner_gas_grill_parts.pdfIn PDF document text
    • http://neketepa.myartsonline.com/jijixafakolunoxarivode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fa7bb4c-2a46-4581-8430-78227145b52c/24080587082.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.

FilenameKindSourceSize
font_00_sfnt_off00012428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12428 5104 bytes
SHA-256: 1e50279d98371c879301dc1a45cc7426e7928574781e4a88148c90874aaf3edd
font_01_sfnt_off00013573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13573 12012 bytes
SHA-256: d27aa77c02d5dda65c7659a81c976266aba52867c838060650ddaf338ff24026

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