Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4eff93a9a2562e2…

MALICIOUS

PDF

75.3 KB Created: 2021-03-17 04:38:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a726db60f53d616547b4f6bb8902539f SHA-1: 7b760cabb0af88ac2c63b969347f02a3b52affd3 SHA-256: f4eff93a9a2562e2e536fafd2908c0172386fdcbc934395f3eec7e660b943295
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with the primary URL being `https://mezovuduw.ru/wix?keyword=sloppy+mechanics+turbo+kit`. This suggests the document's purpose is to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/wix?keyword=sloppy+mechanics+turbo+kit
    • https://cdn-cms.f-static.net/uploads/4371269/normal_601b47d5a9db7.pdf
    • https://cdn-cms.f-static.net/uploads/4480397/normal_6025e7f3b7ee7.pdf
    • https://cdn-cms.f-static.net/uploads/4477623/normal_603fdaaf4463f.pdf
    • http://vomimaforotagi.mywebcommunity.org/lebisiloteponodilolagapir.pdf
    • http://dadevizevarek.scienceontheweb.net/bradley_smoker_recipes.pdf
    • https://static.s123-cdn-static.com/uploads/4484993/normal_5fd08867cd030.pdf
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5fd6378c35d6d.pdf
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5fd252f068406.pdf
    • https://cdn-cms.f-static.net/uploads/4388428/normal_604821a6769e6.pdf
    • http://gibelineg.sportsontheweb.net/89562750701.pdf
    • https://cdn-cms.f-static.net/uploads/4380857/normal_602d3989763ac.pdf
    • https://cdn-cms.f-static.net/uploads/4374540/normal_6043360d74513.pdf
    • http://dakajak.medianewsonline.com/61792912728.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_ed2524ae25144939acd355720e4f7554.pdf?index=true
    • http://xurosuforudev.atwebpages.com/66785498019.pdf
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_ee2a5bd3947243ff866d992e384485b2.pdf?index=true
    • http://natukifuza.atwebpages.com/oxford_bookworms_library_stage_2_the_piano.pdf
    • https://s3.amazonaws.com/dobesogum/keystroke_tracker_software_free.pdf
    • https://s3.amazonaws.com/jepinebawo/gases_in_air_worksheet.pdf
    • http://jemileti.atwebpages.com/old_skool_vans_black_white_gum.pdf
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_dcebddf25688478d8b3b3856b6e1a54b.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8b4.bin
a40afef5355dc0921f220f2bef3c06b0c926915da862df84aff38698da55929e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B4 5580 bytes
font_01_sfnt_off0000fb85.bin
36815578e8dbc752005c7d6de48d44a6e729878b23d0e138c2720c7705cdafb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB85 10756 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.