Malicious PDF — malware analysis report

Static analysis result for SHA-256 727134f44e7d8c4e…

MALICIOUS

PDF

75.5 KB Created: 2020-11-24 12:27:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7cc1286c727630e1f18f65bb7d24f725 SHA-1: d714f84e9eb998f00d7c32ca9fbc45fc427cfb29 SHA-256: 727134f44e7d8c4e76d51a6cd03dd79b6bcb712c709d57acab7c6cf3667dad26
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing lures. The heuristic PDF_SEO_LINK_FARM indicates a mass of external links, with one prominent URL being https://traffset.ru/strik?utm_term=timex+indiglo+wr+30m+manual. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/strik?utm_term=timex+indiglo+wr+30m+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5f87524bd2d37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368772/normal_5f88dc931f130.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_5f886c66718f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380682/normal_5f8aeef98346a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417662/normal_5f969bb958406.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499319/normal_5fb56a80a2ac1.pdfIn PDF document text
    • https://tufobedix.weebly.com/uploads/1/3/4/4/134431979/xeramedebap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pewibim/goxolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51ca8885-5cbb-4b8c-9851-c4c91f40b9a8/41488059772.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/baarish_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/40583890638.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/watch_avengers_endgame_online_123movies.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/freeport_high_school_florida_football.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/48070010247.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43B 3000 bytes
SHA-256: d4a2683c33d66edc676787b28ebb8ee78656469372edf4edc4e93f784e9de350
font_01_sfnt_off0000defe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFE 5184 bytes
SHA-256: 1825df3791483709ab09b940a74d58dcfadb620811ebe05e2539babc9722a560
font_02_sfnt_off0000f08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08F 9968 bytes
SHA-256: 6fdb8387e75b9a6d814991e9cc856ecf28b16b2164319fbfb0837815932488b5
font_03_sfnt_off000112b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B6 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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