Malicious PDF — malware analysis report

Static analysis result for SHA-256 2069c40a66750069…

MALICIOUS

PDF

77.0 KB Created: 2021-04-08 06:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59fb1c7fb7e41a0c2f72bc6d76a5d677 SHA-1: ba636b988ffeccb5251ed4bcc0af227362606723 SHA-256: 2069c40a66750069246b1a0636284f86aac94028a2700faaee37dab61666da5a
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, particularly the link farm detected, suggests an attempt to redirect users to potentially harmful websites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/wix?keyword=craigslist+mn+fargo
    • https://xurexesezegurez.weebly.com/uploads/1/3/4/0/134096141/vofibolijumibese.pdf
    • https://cdn-cms.f-static.net/uploads/4406168/normal_6009eed1840d4.pdf
    • http://wodedutipif.medianewsonline.com/1000_palabras_en_ingles_y_espaol.pdf
    • https://kodopagedo.weebly.com/uploads/1/3/4/3/134350575/kaxovenefako_punanotazexep_vubotobut.pdf
    • https://cdn-cms.f-static.net/uploads/4402504/normal_601f27439e22a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_133a048200884096afaee30189705983.pdf?index=true
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_29be9e89dad04a4caabcba48b6c560af.pdf?index=true
    • https://3d1db4d0-c196-4dd3-8d5c-bb108cafbd43.filesusr.com/ugd/479e38_e2c42b8fd75948248c3a2e6e01d531f6.pdf?index=true
    • http://mojenuj.atwebpages.com/nucleophilic_aliphatic_substitution_mechanism.pdf
    • https://4f65703b-d4c0-4c9c-9e30-73c8cc83ec5d.filesusr.com/ugd/54fa57_03e5515b9d734ad284c1b8f92bcc4d56.pdf?index=true
    • https://fb5b3b17-6e6a-47c5-ae49-26eddba71e57.filesusr.com/ugd/aff7be_2c674f5a94d441969bf6fcf51b3d391b.pdf?index=true
    • https://01d67eed-50ba-4ccb-8f82-c1581f7ed07e.filesusr.com/ugd/e3325f_7496231407e343dbbec7f01c0d180508.pdf?index=true
    • https://d0570615-6cc6-4b78-9a9c-590639bc525b.filesusr.com/ugd/30850e_f0084f19add34920a0970283d47ea2f0.pdf?index=true
    • https://bd04a250-715b-4db0-8087-55ec2f714cf5.filesusr.com/ugd/0c2191_eff796c21f064be1b97701128e2ddeae.pdf?index=true
    • https://571cbd0a-ba82-408d-be6d-2df53a8fcfe5.filesusr.com/ugd/02af14_49cd13fbb33b4c5894cc5313972432ea.pdf?index=true
    • https://6674166f-eb58-46b1-9d38-a528bc95e02c.filesusr.com/ugd/e38d8e_214ac2a076834dd78c73a3513fa1ce26.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4d4.bin
be75594222f5c17671254297d2c754756184cdfd12a8d1f5b5e6217bcd3487e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D4 4780 bytes
font_01_sfnt_off0000f4ee.bin
d4582a0cf8db96fbca50c7115dfb0bd279ecb74d3d8d0f4842356f24a67acc69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EE 10296 bytes
font_02_sfnt_off000117db.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117DB 4324 bytes

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