Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6b8f9a71861abb…

MALICIOUS

PDF

80.9 KB Created: 2021-03-21 07:18:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 24ba76d275d142cd4f246b450efa3e93 SHA-1: cc3d8233813e121ee6ea168742cd3d589a55659c SHA-256: 6d6b8f9a71861abbcf6e6d61baadba6b7664c8745101d9745a7d40f5351cbf93
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The primary URL, 'https://golowaki.ru/wix?keyword=super+mario+galaxy+manual', indicates a lure to attract users searching for specific content. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://golowaki.ru/wix?keyword=super+mario+galaxy+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471945/normal_6026dff033ba8.pdfIn PDF document text
    • https://vunusamonumated.weebly.com/uploads/1/3/4/0/134040658/juzadujukelesogaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415543/normal_60010375ef5b8.pdfIn PDF document text
    • https://latewumopinigan.weebly.com/uploads/1/3/4/3/134313498/6984504.pdfIn PDF document text
    • https://posijakafit.weebly.com/uploads/1/3/5/3/135320461/pomug.pdfIn PDF document text
    • http://dilawiputonu.mypressonline.com/wanulujelavax.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://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_69b8f659324949649898412e7431e200.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b68f46-d70e-497f-96c4-541ed5724863/how_often_do_10_week_old_puppies_eat.pdfIn PDF document text
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_6fdd503ae21a4354bdb071578f0b3870.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zasepo/bardic_performance_concentration.pdfIn PDF document text
    • https://486bfeb6-87d8-40a3-812f-3449909c9139.filesusr.com/ugd/81b904_09eb83161ebc4b43a673f2f36c36c9d6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/preparation_of_haloalkanes.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/gana_harish_ambedkar_song_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c39bdcb1-5024-4da4-adcd-ffa676c9f172/zumefokepizutewipog.pdfIn PDF document text
    • http://mafokesa.onlinewebshop.net/handbook_of_edible_weeds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eb46ffc-c480-4779-beda-e68335aa3c09/batch_file_hide_command_prompt_window.pdfIn PDF document text
    • http://megigezorozo.atwebpages.com/pubapijet.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_off0000f16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16F 5036 bytes
SHA-256: c8e8472b95b0cb0e204a5fe6c44b5cf73e1a0dab85940fb156ea6459b7837c60
font_01_sfnt_off00010274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10274 11308 bytes
SHA-256: b5d0a7171624a80ccf3e4c3e22c9c494df003a1ca5b4f2d8e301d7e5b1c25da0
font_02_sfnt_off000128a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361