Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0b23a8ca46f0858…

MALICIOUS

PDF

70.1 KB Created: 2021-03-05 13:34:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: ce9701799fe4336546b916834a72ae77 SHA-1: c67e8556d9f46d464aaa51a3697dadd4485d966d SHA-256: a0b23a8ca46f0858ff4f82e6ffc48b8d2a0bbb4d4af3df3b44b936fcb6522241
156 Risk Score

Malware Insights

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

The PDF file contains a link farm and an embedded URL that appears to be a lure for users searching for specific information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple external links, including one that is part of a 'link farm', suggests an attempt to manipulate search engine results or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dugedepap.ru/award?keyword=how+do+you+replace+a+garage+door+opener+remote PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366399/normal_5fc796c72f0b8.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/85505504800hehsl.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/nozamidujikabigowupuuxds9.pdfIn PDF document text
    • http://stickerrus.ru/house_of_the_rising_sun_ukulele_chordswvbak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493589/normal_6035aab6a2135.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476580/normal_5fdb8ffd9acc3.pdfIn PDF document text
    • http://maska-respirator.com/ganga_action_plan_case_study6n8yl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_60395e92c0e39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454822/normal_5ff2795103868.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_41c684d0da094cefae0f5ed8db511cb7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/40987116676.pdfIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_4e9939ee8b2c41d29757c2c1b9f0ba66.pdf?index=trueIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_732f3c3b48104dacbca97460fc4ee2a5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/buwosevax/gw2_ascended_weapon_crafting_guide_dulfy.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/vemalevabadelulifelipino.pdfIn PDF document text
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_39e8c64ec63a471dba242561e1b3c394.pdf?index=trueIn PDF document text
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_502d2e89c3bf45c9a0544cdbce49f470.pdf?index=trueIn PDF document text
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_e17a722e4b89438bbe603c7c8e727109.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/30414757780.pdfIn PDF document text
    • https://94aa8f26-b07a-4c24-bdb4-4112657565c9.filesusr.com/ugd/37428b_ea68bf94b54645bfb836ac2ebadac971.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zonivezada/34325163595.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/giselawise.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/durizezosi.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_off0000d742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD742 5372 bytes
SHA-256: bccc1ca9a8d18a5ad47c9bc4dde6a8bb43ec83541385abcfdb4014e8b3c15db3
font_01_sfnt_off0000e988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE988 9800 bytes
SHA-256: e2bdd59da004d8570acc0cfa05ec0acd6e4caf972079f9e808fad0b0a4d9c528

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