Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad0b8739f351c88…

MALICIOUS

PDF

71.3 KB Created: 2021-02-08 09:44:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1565f6dbe1b12b3551d442e15a28d350 SHA-1: 13908858d90cddf012b950531c1d1226dd194269 SHA-256: bad0b8739f351c88bf6fe4eddafd1a1c78b4a0ff32896c2de4e7331d129aa6da
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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://bologen.ru/aws?utm_term=darksiders+activate+chaos+form PDF link annotation
    • https://kunagotuj.weebly.com/uploads/1/3/0/7/130739098/7803779.pdfIn PDF document text
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/7285107.pdfIn PDF document text
    • https://tutemedoz.weebly.com/uploads/1/3/2/8/132814241/ab47b160be77a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490934/normal_60066765c4a7d.pdfIn PDF document text
    • https://cdn.sqhk.co/jegisizozul/igLjbgj/xusivaxiv.pdfIn PDF document text
    • https://bigikudas.weebly.com/uploads/1/3/0/7/130775628/8431856.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/bajapovogam/aquaman_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/17628916363.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/49998669778.pdfIn PDF document text
    • http://labapok.rf.gd/94399373889.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/mime_application_octet-_stream_free.pdfIn PDF document text
    • http://kirigawegugava.epizy.com/arbustos_en_formato_png.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/answers_for_cambridge_checkpoint_science_workbook_9.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/jalapil.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/pagtingin_ben_ben_free.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_off0000dbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAA 5352 bytes
SHA-256: ddff0be643994473d0bc016430076f2316b2e2455926bbcdf224d803b8f75f61
font_01_sfnt_off0000edc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC7 9908 bytes
SHA-256: eb2092660cdd0d11fe5e1240a6151a0216a6856cd72d96faf59bda29f35c8b40

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