Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c9d497094244cf1…

MALICIOUS

PDF

79.3 KB Created: 2020-12-20 18:50:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: e905e62186932095c01e7a5e91fcfa49 SHA-1: d7ea88b812229c25df3b6b00756da0252ec8981c SHA-256: 1c9d497094244cf15bef8fa1d9be14442fb5f8242114523f620c74b002c39d35
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF SEO link farm. One of the primary links points to a URL that appears to be part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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/strik?utm_term=pathfinder+advanced+player%2527s+guide+pdf+2e PDF link annotation
    • https://libadelalisam.weebly.com/uploads/1/3/4/5/134579317/konosoj.pdfIn PDF document text
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/pexejizerupox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f8975a1d7a13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465537/normal_5fae87829d633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451766/normal_5fc2efabec7a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485693/normal_5fd7d9d810c35.pdfIn PDF document text
    • https://gasodugolulo.weebly.com/uploads/1/3/4/3/134375537/9143492.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/c9993ba3-4f7e-4222-a1e3-08d1d6e1f2c4/old_door_knobs_fix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84b31047-8d88-4665-b7ca-93b83102133f/clip_on_pedometer_target.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/37244254718.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/16632027323.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/42763645941.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/fungsi_anaerobic_jar.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/bogatumabixijagap.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_off0000f7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 5748 bytes
SHA-256: 544abb3d4951d518f0ccd36e8f78b318ae485073e08e4e77d70b5c692c4aa054
font_01_sfnt_off00010b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B66 10876 bytes
SHA-256: 0692d92bea7ab791f6aa229d1411c4acce7947dc2c58ed90b18323ae127e5145

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