Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02988e13fa12fba…

MALICIOUS

PDF

88.8 KB Created: 2021-04-20 07:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 198fdc95095a0f6487d645c3dc1caaaf SHA-1: 97789d0667691bab2c3fe53e98153a6097bb77df SHA-256: e02988e13fa12fba5e154646355c693b69cff7108b1aa3d244741a7b3bafbeb0
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a link farm and a ML classifier indicating maliciousness. It contains numerous external links, with the primary malicious URL being https://ponafet.ru/strik. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly unrelated documents. The document body, though heavily obfuscated, appears to be a lure related to 'corporate social responsibility'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=what+is+corporate+social+responsibility+uk
    • https://tizupokewa.weebly.com/uploads/1/3/4/0/134013062/a1f9758248756a.pdf
    • http://varuvoruva.iblogger.org/malachi_martin_windswept_house.pdf
    • https://cdn.sqhk.co/noviraxat/dBja1gj/pafuwolosavu.pdf
    • https://rowopubogapog.weebly.com/uploads/1/3/4/2/134234702/2574761.pdf
    • https://kosipomorogimel.weebly.com/uploads/1/3/4/3/134307263/d5cffc.pdf
    • https://cdn.sqhk.co/naliwanik/h0geNjc/wazarefuzuwewe.pdf
    • https://zupikadi.weebly.com/uploads/1/3/4/6/134667234/c6d9f881d5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/780bbd1a-c386-46e0-8aed-afda481eaa78/guitar_chords_for_beginners_songs_tagalog.pdf
    • http://takefaluzimun.rf.gd/les_accords_7eme_guitare.pdf
    • http://netubufetolanup.rf.gd/georgia_driving_license_renewal_requirements.pdf
    • http://robegataparusur.epizy.com/acidosis_respiratoria_pediatrica.pdf
    • https://uploads.strikinglycdn.com/files/ca3b09ce-6c8e-48be-8605-2b059b1c9e2d/the_testaments_margaret_atwood_review.pdf
    • http://veveliwuw.rf.gd/22788306111.pdf
    • https://uploads.strikinglycdn.com/files/8d04d3f4-56b0-4298-b9b4-bcaacb9d0b30/27807901141.pdf
    • https://907864b8-ab38-4b43-b195-7646ee37c451.filesusr.com/ugd/c4b402_b71186cbb6504b739f5ec18b65ecd147.pdf?index=true
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_93221bf6297640b28132826b398bafe8.pdf?index=true
    • https://e590c0d9-b694-44fb-9862-47327b30d8b0.filesusr.com/ugd/89363e_bee27c83da134b19bea02c39350e6a75.pdf?index=true
    • https://uploads.strikinglycdn.com/files/28dd20f8-10dc-44e2-902b-e05c617f7a59/step_outline_example_screenplay.pdf
    • https://uploads.strikinglycdn.com/files/ec3f5f18-a9ba-443d-a01c-6b320f2413f0/how_to_connect_jbl_flip_4_speakers_together.pdf
    • http://zegedoro.epizy.com/cabbage_soup_recipe.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa9f.bin
b97c2264a0bf4c7f09fed354a50edf43d3f8cee394fe060c84848c07c35118a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9F 5220 bytes
font_01_sfnt_off00010c5f.bin
9c784d421b730a29fdbe5c71fc0fcea7490645f84cd59ac33448335e6c25f788		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5F 11188 bytes
font_02_sfnt_off00013280.bin
2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13280 16060 bytes
font_03_sfnt_off00014717.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14717 4324 bytes

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