Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f154cffcdadf92…

MALICIOUS

PDF

73.3 KB Created: 2020-11-20 20:39:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 0bd3cf46d604777ecbb4aa563197d054 SHA-1: 3726c67e4e4f4a3d9b7feefb256423aa5671deaf SHA-256: e5f154cffcdadf921fa1a004d7919c2e8f2cb9c928c5cd54c93cd5012b56da04
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs, which is indicative of a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://trafftec.ru/123?utm_term=modern+combat+5+apk+data+highly+compressed PDF link annotation
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/xopevu_vilugarokobijos_fimorekon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453336/normal_5fb3c8d8f3b1f.pdfIn PDF document text
    • https://jopomewimedadi.weebly.com/uploads/1/3/4/4/134465277/774c3a76c3e08.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/1409537.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/tarajix/85502195875.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/bose_lifestyle_25_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/how_to_find_oblique_asymptotes.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/chasers_of_the_light_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f0842c4-284d-442e-8f27-f775c402c21e/enderman_head_minecraft.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/fojodapumojumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0bfeb76-e172-44c0-b6e6-10c539873edb/xiresusawavugazaxujel.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.

FilenameKindSourceSize
font_00_sfnt_off0000d4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EF 2892 bytes
SHA-256: 292a4a54f648fab6437eb5b9213a556ddf81631b963badc57896b29c5d3adddb
font_01_sfnt_off0000df4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4D 5924 bytes
SHA-256: 234492882181f2d7589c07bd122a4b4af6e7baeafbf2ba1a81ad43fe70c7c0bc
font_02_sfnt_off0000f35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35B 10836 bytes
SHA-256: 8a48a3a44a6153f421569bfbee145ea7d49c99ccb28ebce3818f57353c268714

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