Malicious PDF — malware analysis report

Static analysis result for SHA-256 259de274ecabe249…

MALICIOUS

PDF

95.5 KB Created: 2020-11-12 14:39:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b456e89d2fea621e0dd02ff865940590 SHA-1: 98565636427d094b3bd94c32e7e4e4ca45a21803 SHA-256: 259de274ecabe249112d3878b96d877a4f25301e5445b8ae6c6e0bc919d2da7e
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 0.9997

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://traffine.ru/123?utm_term=bramblestar+and+jessy PDF link annotation
    • https://jopizogado.weebly.com/uploads/1/3/4/3/134317888/83f3d9fd50e.pdfIn PDF document text
    • https://gitijekukojijot.weebly.com/uploads/1/3/4/6/134626905/zedimo.pdfIn PDF document text
    • https://ketulujuzix.weebly.com/uploads/1/3/4/6/134649002/ef4dced41962bd.pdfIn PDF document text
    • https://gefosutobova.weebly.com/uploads/1/3/4/6/134647182/959eb3d6e.pdfIn PDF document text
    • https://joxezikawatunex.weebly.com/uploads/1/3/4/6/134699300/vewutoguterinawanus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec4854c-620f-452c-b26f-554fb055577a/50930417165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5372dcf6-3d32-4083-aff9-b4d57f671bb4/inner_transition_elements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e6a7de-9d9f-44a1-8a83-05228f9176c1/jatumamekeviborasavizeda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d719b1ad-bb4d-487f-97f4-1c14e52ac1a8/rarovebekividagilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd6d3c4-4930-4c30-944f-76a41f733a4e/gaxedorir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cfcd0c9-c730-4009-ae7d-ae667c752fd4/vubaboxuduminet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f925db6-2b20-489d-a981-b871429a92ff/zujura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab353b7f-f49d-40b0-8e1c-52b821ff0d5f/kagepotugixopozu.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/xaboziduwad.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_off00013b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B3F 5336 bytes
SHA-256: b69f93f5cd96c35824f4042c8c05f526bba9d533d958d88eee00d2416e3d7f0c
font_01_sfnt_off00014d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D54 10540 bytes
SHA-256: 2300cf912a3db52a8ced4b98034e6566592a413714a4f984e38ce6809bddc863

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