Malicious PDF — malware analysis report

Static analysis result for SHA-256 32db5facb6efaab0…

MALICIOUS

PDF

99.8 KB Created: 2021-03-21 20:38:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ef536a0656127d6633853776cdbfc9e SHA-1: 5b00c3a7ffe264be4c5f0c8e67313d93aba3fcbe SHA-256: 32db5facb6efaab05040a1a55357b5aef6fa111e2d7930d58d0b3bf209e02bff
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, including one to 'golowaki.ru', suggesting it's part of a link farm or SEO spam operation designed to redirect users to potentially harmful websites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to drive traffic to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/wix?keyword=my+hero+academia+english+dub+actors
    • http://snapchat-alert.com/rotoworld_nfl_worksheetajh4o.pdf
    • http://copyright-services-us.com/fast_easy_way_to_wrap_presents4osc7.pdf
    • https://cdn.sqhk.co/pazibafax/gjOJicT/successful_parenting_secrets_by_nwosu_friday.pdf
    • https://cdn.sqhk.co/webaxepibi/he7ibhl/blendoku_medium_level_31.pdf
    • http://com-signto5.xyz/waring_pro_waffle_maker_wmk300_partsgki2k.pdf
    • http://yarrebitteh.online/919261070552vazb.pdf
    • https://cdn.sqhk.co/gejixoneku/Gjtjgje/mimpi_dreams_switch_review.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2502d21a-4cf9-48fc-b664-886cadc1383d/91917296688.pdf
    • https://s3.amazonaws.com/tojabixefova/fosarebofedib.pdf
    • https://s3.amazonaws.com/vonuxagupeduze/kanudepikapaluwikokipi.pdf
    • https://c5ee87e3-0a33-4977-aa5c-57820a25ff6a.filesusr.com/ugd/455f95_ad942f3f6bd942c7931cbeeffb4d99c3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/eb4bbb1b-fcb5-4eeb-90a0-2c4431fd7ea6/how_to_fix_chest_freezer_not_freezing.pdf
    • https://s3.amazonaws.com/zuwosil/children_s_place_uniform_jeggings.pdf
    • https://s3.amazonaws.com/lebaxa/timalalofa.pdf
    • https://b1f0a730-f0e4-4bcf-918d-a915077b90d0.filesusr.com/ugd/a7c69d_82f19432c60045a797600107273fcb72.pdf?index=true
    • https://s3.amazonaws.com/werowibovezoje/fuxomofivepilepitinakev.pdf
    • https://uploads.strikinglycdn.com/files/e00f5f63-7750-4e59-9d7b-9b3841f071f4/judinaneke.pdf
    • https://s3.amazonaws.com/zizene/sweet_camera_selfie_filter_beauty_camera_apk.pdf
    • https://uploads.strikinglycdn.com/files/f457ad72-e1f7-4b0f-a0eb-fe8d11c36ec7/39086972861.pdf
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_e1912b5d11ee47beaa705e6b8d311993.pdf?index=true
    • https://s3.amazonaws.com/zemunomipazikez/womumiki.pdf
    • https://s3.amazonaws.com/gavapozalilup/star_wars_edge_of_empire_character_creator.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001338a.bin
fccf4d38a57c10a27d99ed11cb54cf0e10cf87612221ef50d8b32fc8b1dbb3c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1338A 4652 bytes
font_01_sfnt_off000143e5.bin
f7c7675f57fff85c093dc5c6407ddb3e0265e114dee4f3d6e6102217645ff1b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143E5 5600 bytes
font_02_sfnt_off000156ce.bin
f27334569045df0608eca09a114b7d6da359d0997e546abc643042cc2eb05929		 pdf-font-stream PDF embedded font (sfnt) at offset 0x156CE 12448 bytes

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