Malicious PDF — malware analysis report

Static analysis result for SHA-256 072892eff38f3623…

MALICIOUS

PDF

70.9 KB Created: 2020-12-20 11:42:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a21ae0a6d36d14b4289db03dd022615e SHA-1: bf06ec5b2229e4fd127820f998796aacc659ac42 SHA-256: 072892eff38f3623d6a33baa1a2e51caa9fffc643a89876af5bd367d2a5ae03f
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute malicious content. One of the linked URLs, 'traffking.ru', is flagged as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?utm_term=what+grade+are+you+in+at+9-10 In PDF document text
    • https://jobipidamefoji.weebly.com/uploads/1/3/4/6/134696246/641605.pdfIn PDF document text
    • https://dojufewuwi.weebly.com/uploads/1/3/4/2/134235401/194681.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wexoteluwag/lc0_chess_engine_for_android.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd2b8fd7fbea164c2cd44a/t/5fdd765091828d0f5d30b75f/1608349265274/bengali_music_ringtones_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42fb345a-b261-48e1-9963-c63514ba51c9/44803993628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/962edbd3-cb41-4461-8532-fafd19b3f4f6/how_to_log_into_ttm.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6576724b06a7eb324b17b/t/5fcf7a94798354522d119417/1607432853037/sonny_acres_admission_price.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd37885b7bc966055e0d98/t/5fde4eb75809ae3434f78ce2/1608404664336/loteria_del_abecedario_para_imprimir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/853e51d0-6bad-4c38-8226-c5a865903484/61904618967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e97aaf7-281a-4a92-a696-17b848276dbf/halki_diabetes_remedy_amazon.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd2b976394b41d6424bdfb/t/5fde79eff3f88b619f0c152c/1608415728870/xojavir.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/steve_harvey_family_feud_dumbest_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB20 5256 bytes
SHA-256: e2ad1c0b1409ab6ea0b143ebad21c0a68652482be01b7afb79ccf2f4888fa40f
font_01_sfnt_off0000dd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD18 10540 bytes
SHA-256: 0b412730a87a6dd601b82c4e3a8289b09cb0830ebe6327b56170689dab56f4a1
font_02_sfnt_off000100d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D1 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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