Malicious PDF — malware analysis report

Static analysis result for SHA-256 7650ea0f63e0b529…

MALICIOUS

PDF

74.3 KB Created: 2021-02-27 02:47:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 803ee3a0a5ce1b72df13339fdc301f78 SHA-1: 8c6d9b4d0c9b800c647d6bcba75486083e23a480 SHA-256: 7650ea0f63e0b5295abad9c97a9bb91e7542df8ac5d86d7dfb7ba64d7a0c9f76
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 0.9997

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://jumiwimov.ru/award?keyword=english+grammar+learning+software+for+pc PDF link annotation
    • https://vulopinuvi.weebly.com/uploads/1/3/1/1/131164419/6442714.pdfIn PDF document text
    • https://pasuwuzo.weebly.com/uploads/1/3/1/4/131438486/a4c17b.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/denon_avr-3313ci_service_manualj0e4q.pdfIn PDF document text
    • http://italywow.pro/walmart_switch_games_cyber_mondayxiua5.pdfIn PDF document text
    • http://uniques.space/mivomepamiwimagimitofelembp1se.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/1ffcd96c0b5c.pdfIn PDF document text
    • https://bipufufutugudov.weebly.com/uploads/1/3/1/1/131164095/9408856.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/dVhj7gg/bijitotufin.pdfIn PDF document text
    • https://cdn.sqhk.co/pesasotiro/jic8hgh/67682012591.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/ecce597d5192.pdfIn PDF document text
    • https://jegofedakosufe.weebly.com/uploads/1/3/5/3/135320490/kixufilo.pdfIn PDF document text
    • https://nijuvabuf.weebly.com/uploads/1/3/5/3/135326727/8055463.pdfIn PDF document text
    • http://cz-nitrof.website/how_to_make_homemade_slime_without_boraxvir1l.pdfIn PDF document text
    • http://skidki-day.site/burning_smell_from_lg_washing_machineumywj.pdfIn PDF document text
    • https://wikumegi.weebly.com/uploads/1/3/1/4/131407968/gekojokenobal.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/luworizesupox/17481438163.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/ccna_1_lab_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/71425145102.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/astaghfar_dua.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/pandoc_templates_gallery.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_off0000e5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B2 5476 bytes
SHA-256: 153a2cf1615f2cbeda02e95683a93883333ad27a81192e189b0449ad551ad34e
font_01_sfnt_off0000f844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF844 10492 bytes
SHA-256: 013298ea3e5cdeb0235a86f6554c83dba22834630bb4f11a8e4b7f3a0c4d82af

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