Malicious PDF — malware analysis report

Static analysis result for SHA-256 6015f389929da82e…

MALICIOUS

PDF

83.1 KB Created: 2021-03-11 22:01:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 031b9d21a6650a907ad26e6006bf0ef3 SHA-1: 422b5c48951a7e9fd940a6a879d073ac475580e5 SHA-256: 6015f389929da82e01768f4c84e31d0de07a14121380e271d316530a06bbf66d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical finding for a PDF link farm containing 30 external links, and ClamAV detection as Pdf.Phishing.Trojan. The presence of numerous external links, including one to a potentially malicious domain (bologen.ru), suggests an attempt to redirect the user to a compromised or malicious site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=dictamen+ley+de+austeridad+republicana+pdf PDF link annotation
    • https://cdn.sqhk.co/xotosobupis/dKrgfhi/block_craft_3d_hack_no_human_verification.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503525/normal_6047e1d49dfef.pdfIn PDF document text
    • https://razivizufizide.weebly.com/uploads/1/3/4/5/134525322/sogun.pdfIn PDF document text
    • https://cdn.sqhk.co/xudadidi/Dhj0HMc/78249360841.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391954/normal_6000b2e76d5ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407724/normal_5fcf021283f13.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/iUNgfhj/small_cardboard_boxes_near_me.pdfIn PDF document text
    • https://tupirusu.weebly.com/uploads/1/3/4/7/134702138/fozibawibuzu.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutesilo/jbgeqia/38478588706.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bezutu/xejolobusuropelej.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/o_que__balanced_scorecard.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/junufoxulesujowesa.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/daduxofivesojipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/221acb04-3101-4ea4-b050-2f9e67aed253/82585555593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a66a2253-05ce-49c7-817a-ad339b678b85/peter_drucker_books_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48f512a6-5d5a-4b44-889e-026698d1da7d/what_is_a_scouts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b98aed11-ca3a-4a5d-a722-ac1a70b5dd9f/60408658288.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/35418543769.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/adform_api_integration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41668ccf-789e-4d9b-95f7-280d4da2af98/82902945896.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_off000104a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A6 5540 bytes
SHA-256: bcaf2aec95775384384a19067459bf3f9dc3c6bbccf5e039ddafc5d4c1705d2a
font_01_sfnt_off0001176f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176F 11648 bytes
SHA-256: 9ea43eb2263264d8446bb048cc5b84d6d0cc0ef1a23f1bd5fbe6045c3c2ace6c

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