Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdeb629c38423c06…

MALICIOUS

PDF

116.5 KB Created: 2021-03-20 22:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1807b2b352c6a2aff96756e132f11e41 SHA-1: efdb5d37b12bb1a5701b26fec8c4abe3cfe351f3 SHA-256: cdeb629c38423c0601b0e67c8b073178adf35c64fbdc6099ff56c122c59fe737
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, with a critical heuristic firing for a PDF link farm, suggesting it's used to drive traffic to other sites. The embedded URLs, such as 'https://leonvi.ru/wix?keyword=the+summer+palace+captive+prince+pdf', are likely part of a SEO manipulation or phishing scheme.

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://leonvi.ru/wix?keyword=the+summer+palace+captive+prince+pdf
    • https://jitedamanun.weebly.com/uploads/1/3/4/6/134627504/7981a081646f30.pdf
    • https://juxibawazorar.weebly.com/uploads/1/3/3/9/133997202/mazoxapupopapewexib.pdf
    • https://ditoleruv.weebly.com/uploads/1/3/5/3/135345680/zakibogugu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/32eb6a94-2725-428e-be75-7f16b21d90e3/dirt_devil_power_max_pet_belt_replacement.pdf
    • https://s3.amazonaws.com/ligole/22592242889.pdf
    • https://uploads.strikinglycdn.com/files/e0752b3a-efb0-427e-a01c-03e2f29b0cfd/casio_g_shock_watches_melbourne.pdf
    • http://giverez.epizy.com/best_air_injection_iron_filter.pdf
    • https://uploads.strikinglycdn.com/files/530423d0-1e19-41e0-bf0b-a1c162b3f460/dixivu.pdf
    • https://s3.amazonaws.com/ragejufa/50999309375.pdf
    • https://uploads.strikinglycdn.com/files/3cbdff7a-fc3d-4c24-8f02-b6ebff796149/what_are_the_rules_for_adding_positive_and_negative_numbers.pdf
    • https://s3.amazonaws.com/fumiposamisur/bafg_formblatt_3_ausdrucken.pdf
    • https://uploads.strikinglycdn.com/files/bdb1bba5-c205-4d70-86aa-e85d827606a1/simile_and_metaphor_lesson_4th_grade.pdf
    • https://s3.amazonaws.com/lovomijelun/sotufowaxubu.pdf
    • http://vonimamodiji.rf.gd/plan_a_meal_plan_80_day_obsession.pdf
    • https://s3.amazonaws.com/bezegoluzose/gangster_movie_2006.pdf
    • http://bekokutiwafodi.epizy.com/59408954666.pdf
    • https://uploads.strikinglycdn.com/files/55829dfb-9732-4cbb-80fb-64f538fd6c9a/how_to_verify_trigonometric_identities_calculator.pdf
    • https://s3.amazonaws.com/dowavelaxam/mcdonalds_online_form.pdf
    • https://s3.amazonaws.com/gafedupeba/mountain_horse_polar_breeches_size_guide.pdf
    • https://s3.amazonaws.com/juduk/social_security_system_forms.pdf
    • http://mifisabewup.epizy.com/22486439331.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_off00018a5e.bin
1e779148e0e5cb6d2be05468c2163caf2d4c8ab2c30a51b8d2c465b10eda4ee7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18A5E 5404 bytes
font_01_sfnt_off00019c97.bin
11c0f35a4fe9b44fe94a8f7f6581a92f369a6133a982d77c4ea89533ee13e84c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19C97 11632 bytes

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