Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83401c92d4227b5…

MALICIOUS

PDF

80.6 KB Created: 2020-11-26 09:28:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b32662d0bf04918dc31797e4cfe292e4 SHA-1: dbff4c541f07f09128d541632f289799236ce4e7 SHA-256: f83401c92d4227b5f039c012c9f78fcf78e742929787ed45208ea8a48cb375d1
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://trafffi.ru/strik?utm_term=free+tiktok+followers+no+verify PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379848/normal_5f8b2e67d0a94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415936/normal_5fa0f7207bc8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f91a830d82b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401971/normal_5f9ddf0319f9c.pdfIn PDF document text
    • https://nupureforisuro.weebly.com/uploads/1/3/4/3/134353583/vumevefar.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/rerimopotesim_fasafobekimula_megesiwasego_zawenadafe.pdfIn PDF document text
    • https://newususop.weebly.com/uploads/1/3/4/8/134893013/2742843.pdfIn PDF document text
    • https://wivujawa.weebly.com/uploads/1/3/4/5/134582083/lubuwako-pusedabobimagix-rirowanazejedol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421478/normal_5fb9b72ea0c29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410986/normal_5fbf216c87128.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/752a11b8-f30c-492a-b885-4695d4edbc63/81968590054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/971d414b-f8ec-4246-86f6-c716d54fcbbf/old_melnor_water_timer_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8dc5cb0-11fe-4f47-8b04-e57c009d1106/rokaveboxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cedaec40-98cd-46ac-ab7e-74a896e6423f/89557726197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/486e47b7-2f8e-4009-8135-37c708e6f9e4/80016626922.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6E 4612 bytes
SHA-256: 25ffb02b295f97065c1fd2a4878f464e62617c3124937bcbf14590d93ae5691b
font_01_sfnt_off0000ea41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA41 11460 bytes
SHA-256: e8fae0558adedb3a718b8972adf3db05383abc9832bc383e55481a8b68e545e6
font_02_sfnt_off00011165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11165 16136 bytes
SHA-256: 2d2f78d8bddef1da029c202afc1155986992089e0384b8cccb0ee3de9320d4c0
font_03_sfnt_off0001266a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266A 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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