Malicious PDF — malware analysis report

Static analysis result for SHA-256 789efbc7bd6db610…

MALICIOUS

PDF

74.6 KB Created: 2021-01-08 03:02:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: acf139340eeea8e53e79d687b133d872 SHA-1: 8b5f5fd7b816c6200cfa5ceb3000e23996bdfc3d SHA-256: 789efbc7bd6db610551c774e4946aa2e349a4d957f0a0849077af8ff53df8317
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains including 'traffset.ru' and a Weebly subdomain. This suggests an attempt to manipulate search engine results or redirect users to malicious content. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/123?utm_term=romans+9+25-29+meaning PDF link annotation
    • https://xizadububexo.weebly.com/uploads/1/3/4/5/134595199/7e3405135.pdfIn PDF document text
    • https://tejifogigevavep.weebly.com/uploads/1/3/4/6/134675995/vexuda-xuxamagosadudi-ribekit.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/fonazuzixagizir/ayersville_high_school_choir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f97aade-c43e-453f-b263-4a7cf743136b/princes_of_the_universe_tab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cc3406a-247b-4734-91fd-9c4d188315e6/apk_mario_bros_123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ee5cf9e-318b-4fec-a7c2-88bf6ed47b98/bonafide_certificate_format_for_qata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb01483e-f529-4f3c-91b6-56db9d352c89/condom_size_calculator_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cba66923-25fc-48cd-a4ed-599ce0f971b5/brilliant_earth_reviews_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/actors_studio_alumni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/883783c5-db73-4375-875d-b3b5f2f6f63d/crossdressing_symptom_of_underlying_problem.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/free_word_templates_christmas_borders.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/3279125913.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/uc_browser_tamil_video_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/046ce01f-319c-438b-a668-1011f49a7f13/make_your_own_solar_system_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff378af4-174c-4b42-bb60-3eda4ec5544b/centrifugacion_en_la_industria_alime.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_off0000e821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE821 5328 bytes
SHA-256: 13a2034ba89aba4c0f2012ff227e80769c1ebee55b64e785f1a183f594599ced
font_01_sfnt_off0000fa3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3B 10508 bytes
SHA-256: 7b1169109f389730f1b2a9b83820347720fbc70a63f4f725fbee6b9c3e61a34d

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