Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc4b692ba853079…

MALICIOUS

PDF

77.1 KB Created: 2021-02-22 04:20:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e1fabae972d3242e8fa2b8ec7d42c0ba SHA-1: 29bc3512198f3c298deb9cf2e185dc0b6ee19dbe SHA-256: 9fc4b692ba853079a0a89636485d1de56ee56668a9a264d491aa7da19ef987cc
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=revelation+space+pdf PDF link annotation
    • https://tivenudonokokom.weebly.com/uploads/1/3/0/9/130969369/87871f.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/ichTLGV/83998146629.pdfIn PDF document text
    • https://nulowuze.weebly.com/uploads/1/3/4/6/134614321/vexixovuwoditiduxe.pdfIn PDF document text
    • https://rimofunoduw.weebly.com/uploads/1/3/4/5/134525219/befuzuxuz.pdfIn PDF document text
    • https://sajofagexureleb.weebly.com/uploads/1/3/4/6/134652103/f2670f.pdfIn PDF document text
    • https://kujivapepomo.weebly.com/uploads/1/3/4/5/134591142/dajezilutemuv-nujujeduxa-soxore-dobufew.pdfIn PDF document text
    • https://zavitakeji.weebly.com/uploads/1/3/4/9/134904790/xeruzekafakike-tujodazezaneje-zopidub.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/wobuzisibal/tebajunapesopakaxawima.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/bibepaxuverumaxilejiwe.pdfIn PDF document text
    • http://sitotozip.rf.gd/el_paso_police_department_file_report.pdfIn PDF document text
    • http://ziradisam.rf.gd/babri_masjid_movie.pdfIn PDF document text
    • http://wosumobikufiw.rf.gd/tikevinoxinunakuzunu.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/amoeba_sisters_human_body_systems_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/81574567322.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/nepugubopaso.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_off0000d7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A1 4908 bytes
SHA-256: 29f309279d395829f5fbcef9bde68abf8c83eea5aae55f74242e8905c1ab7161
font_01_sfnt_off0000e871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE871 15284 bytes
SHA-256: 854698a8fe9991a7d822656a4fc1e760c984efbe650c59e6d01ef8aa1f86cec8
font_02_sfnt_off00011777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11777 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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