Malicious PDF — malware analysis report

Static analysis result for SHA-256 57fc05e9dc5bb036…

MALICIOUS

PDF

80.5 KB Created: 2021-02-25 11:16:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 937c201f559d99402bb752b1aa81e1d0 SHA-1: f7933f1e52244c58a95f288ddedf33a78b857909 SHA-256: 57fc05e9dc5bb036b93d587ac97b4b5741e083eae4b020a258a4b46a7d1205f5
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to Weebly and S3-hosted PDFs, indicative of a link farm or SEO spam operation. The embedded text 'Taurus pt111 pro dimensions' and the URL 'https://baarspo.ru/aws?utm_term=taurus+pt111+pro+dimensions' suggest a lure to a malicious website. ClamAV and ML heuristics confirm the malicious nature, flagging it as a phishing trojan.

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://baarspo.ru/aws?utm_term=taurus+pt111+pro+dimensions PDF link annotation
    • https://ranetaxute.weebly.com/uploads/1/3/4/8/134886021/348787.pdfIn PDF document text
    • https://sipemesiga.weebly.com/uploads/1/3/4/0/134095973/0804ca37b55b02.pdfIn PDF document text
    • https://ruvawuwejijexut.weebly.com/uploads/1/3/0/8/130814193/1401993a5911faf.pdfIn PDF document text
    • https://likizosuzi.weebly.com/uploads/1/3/4/8/134886942/1624058.pdfIn PDF document text
    • https://pasugewu.weebly.com/uploads/1/3/1/0/131071180/962d4beb.pdfIn PDF document text
    • https://togutugu.weebly.com/uploads/1/3/4/6/134617883/7743619.pdfIn PDF document text
    • https://duzozerijadid.weebly.com/uploads/1/3/4/4/134493401/572b7b55d9f8018.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/bajuse/napavufub.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/fomixiliwepozew.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/bhagwat_geeta_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/pose_method_of_running.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/action_hero_biju_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/aggiornamento_pes_2019_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/f._a._m._e_maluma.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/xa_trang_file_online.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/tigonubopa.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/45304052386.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/60564527450.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/wordscapes_answers_level_4000.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_off0000f494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF494 5072 bytes
SHA-256: ffdedafb5faba6973d7f0ce379d2883a0dd1299860bbc08e64b32c1f1c7551e8
font_01_sfnt_off000105c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C5 15076 bytes
SHA-256: e189ca34d99389def2ca667cfb0054938241ece83df2e791c977014f3447fff7

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