Malicious PDF — malware analysis report

Static analysis result for SHA-256 859ca56c506fb42b…

MALICIOUS

PDF

62.1 KB Created: 2020-11-23 15:42:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 11a1d530d356e750f0ecb142edeadfb1 SHA-1: 92f067da60b083c8b5ca8889e89e538d943550c3 SHA-256: 859ca56c506fb42b88be7e8565db279e001194e77f78c0f7fc42cfff4c55e994
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9994

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffking.ru/strik?utm_term=radiohead+ill+wind+download PDF link annotation
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/lusilataviludova.pdfIn PDF document text
    • https://fibigator.weebly.com/uploads/1/3/4/3/134313363/cdf64e4b.pdfIn PDF document text
    • https://xudiruxi.weebly.com/uploads/1/3/4/6/134630049/a48d59fedd36105.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/nisidunepodibowuxe.pdfIn PDF document text
    • https://sebiwijojemobod.weebly.com/uploads/1/3/4/0/134097571/zovosuja_kowete.pdfIn PDF document text
    • https://jipidonano.weebly.com/uploads/1/3/4/3/134340070/volox.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://uploads.strikinglycdn.com/files/5a61639e-beca-4056-801d-9039ac6cc34a/zoxaj.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/46253534790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26a81880-7d8d-4505-94a3-589faacb7ee1/nom_courant_de_linfluenza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2fe1ca1-5b07-439d-b05f-f378e7ddde60/coupons_for_chewy.com_july_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/99548066721.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/back_hand_mehndi_design_simple.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_off0000acd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACD1 4448 bytes
SHA-256: 71365d44ecd9037c1d1c0e75dd139fffdcfe0eba9f1475a196bd8f8a7331206e
font_01_sfnt_off0000bbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE2 9880 bytes
SHA-256: 7bb1b9fe3367504c81f794663e8d283b83346cd29375d48190aeeb930bb4fa94
font_02_sfnt_off0000dda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA3 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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