Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a444af90906af5…

MALICIOUS

PDF

86.4 KB Created: 2021-04-05 11:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e68d09424aae4c885cdd8a44b8f4e306 SHA-1: b89a88124336e4bc620b00016c02350f3381dcf0 SHA-256: 96a444af90906af5d5eef1bce71fc22baea57ef4e849c0e371f3b0fd6092cfd9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to Weebly-hosted PDFs, suggesting a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful sites.

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://ponafet.ru/award?keyword=the+tyranny+of+distance+geoffrey+blainey+pdf
    • https://fizabogozof.weebly.com/uploads/1/3/2/8/132815807/1056884.pdf
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/rezofexenubi.pdf
    • https://gikotaduxig.weebly.com/uploads/1/3/1/4/131454052/7d8480.pdf
    • https://narivuwejuw.weebly.com/uploads/1/3/5/3/135310919/wugazojezotutim-vetixizefoke-rofamata-bozuxaleviw.pdf
    • https://xagapetudiza.weebly.com/uploads/1/3/4/6/134686513/5667976.pdf
    • https://guzesunidami.weebly.com/uploads/1/3/0/8/130873942/b70238da963e.pdf
    • https://gefivogixofix.weebly.com/uploads/1/3/0/9/130969648/wajudogerofofo.pdf
    • https://davufafelasipip.weebly.com/uploads/1/3/4/3/134328138/3433644.pdf
    • https://valezofijamope.weebly.com/uploads/1/3/4/4/134445284/3846569.pdf
    • https://budogifu.weebly.com/uploads/1/3/0/8/130874026/8383060.pdf
    • https://wofiwajelakezod.weebly.com/uploads/1/3/6/0/136092853/6228919.pdf
    • https://duzetokip.weebly.com/uploads/1/3/4/4/134404829/mededado-pofezotikagevud-fafenemitiw-dujunoxow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fatikonavori/jujupuwalolabasarutit.pdf
    • https://s3.amazonaws.com/lawakux/79078566537.pdf
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_3803b04f743e4cbcb2ca9fa124613904.pdf?index=true
    • https://s3.amazonaws.com/fukezavazuj/uppababy_vista_sale_canada_2019.pdf
    • https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_ef3a4caf103b428faaf51cf21214edd8.pdf?index=true
    • https://s3.amazonaws.com/daraniwekamidir/bride_of_the_century_episode_10.pdf
    • https://s3.amazonaws.com/fifomi/how_to_do_log_base_on_ti_89_titanium.pdf
    • https://s3.amazonaws.com/tesotiwapax/lezokalutulelipubux.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011131.bin
2e489bd97f02dccbfb8e18613f3434405023397c00322d8f86f876c6bf60e37b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11131 5608 bytes
font_01_sfnt_off00012443.bin
f66fe3e06aa1cd9790d1059da25f981278e512ea51f83b4cce0dd9fc64840852		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12443 11592 bytes

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