Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df848e80e4ad628…

MALICIOUS

PDF

60.5 KB Created: 2020-11-16 21:27:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c65c57e657862c911113ba682077c478 SHA-1: 6d3ec781f1ea79dafc4c7d015d115aa813ac183e SHA-256: 0df848e80e4ad62858747443b460e15842857df7d7ab6191be07e82aecd98cb5
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 0.9996

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://trafftec.ru/123?utm_term=dua+for+bathroom PDF link annotation
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/durafufoxo.pdfIn PDF document text
    • https://sekulawovow.weebly.com/uploads/1/3/4/5/134578441/493898.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/a4b1c835-1ce4-4425-adf3-c86bea65bdc6/massachusetts_2a_hoisting_license_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/augustus_prima_porta_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/9041952140.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/sample_apology_letter_to_boss_for_mistake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e9cb4df-6258-4640-89a0-fe418d3c6497/60666876894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76752e55-7005-404d-b942-3ea11eb88929/mapei_grout_color_sample_sticks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c432d08b-ed65-43be-a604-28092dfe15e1/krav_maga_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/agile_project_management_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1a5e497-a995-4e58-b748-aa97518a7417/78287351993.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/34719605574.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/vosejezu.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/notice_of_xbox_live_enforcement_action.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e929b0b-0501-4b48-bcbc-d460d13804b7/xuraro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eea020d-2711-47db-9d28-405533e27a89/57250404373.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_off0000b43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB43C 4936 bytes
SHA-256: 858cd49ccf94378826f5067d3a2c7f98b7fdc731de58de103294ebf279a62152
font_01_sfnt_off0000c4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E7 9456 bytes
SHA-256: 6253c158983f9078494573f7ae1af559158eab9b28e58dd461515796335aa002

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