Malicious PDF — malware analysis report

Static analysis result for SHA-256 6addb6a88bbc3c6e…

MALICIOUS

PDF

86.9 KB Created: 2021-03-21 23:00:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b33fd2d971a4e323389452a6f6cc59f SHA-1: e033398be4b272f5f41c312eec136b1016ab0a4b SHA-256: 6addb6a88bbc3c6ec257fd73c747672b2b05b6f3b594ff3cc463a16c2906d8a4
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link leading to 'xezojetit.ru'. This domain, along with others found in the document, is associated with phishing and malware distribution. The presence of a 'PDF_SEO_LINK_FARM' heuristic firing indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6068

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://xezojetit.ru/strik?utm_term=hunger+games+catching+fire+book+chapter+summary
    • http://milesnires.xyz/wopujizasirofililetgznd.pdf
    • https://cdn.sqhk.co/xuxozowaki/XsVoGC8/demuridavijonopowudomedod.pdf
    • https://cdn.sqhk.co/zozusexub/gqqhe7S/89481168419.pdf
    • https://cdn.sqhk.co/mekaxosur/dXAibY6/fnaf_forgotten_memories_2.pdf
    • http://mbfsopg.com/witches_of_eastwickneuu1.pdf
    • https://cdn.sqhk.co/bofagenined/iC8ijje/stupid_zombies_3_cheats.pdf
    • http://spoonnumberone.xyz/jolojilebulobusisiwaderawwd2a.pdf
    • https://cdn.sqhk.co/vopokemib/bJ0YXje/zilexeko.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/b6ca5a87-4147-450a-aefa-ac3b13cb784c/87692817650.pdf
    • https://f38be386-5799-403b-9303-fb121113655a.filesusr.com/ugd/6f1aa7_1ab17ef9f5bd493fb6030877b1aa6648.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7dfbb284-1807-4456-bd5c-e305780f2380/46969416141.pdf
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_11f5e183c0a44013a9918c4168e5f2d4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ce0720bf-275a-4613-ab5c-dd5655a056eb/70567571354.pdf
    • https://uploads.strikinglycdn.com/files/2468a0c0-835d-477c-8408-7febd9cfad5a/kohler_20kw_generator_cost.pdf
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_090362f61f2f4170b54a1d277b30ecdc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c3c9f146-d402-40c3-87a0-ba3d276884a0/37783853974.pdf
    • https://uploads.strikinglycdn.com/files/0681c483-bf8a-4629-ad1b-8f8d2b4604b1/defibixurozifexofod.pdf
    • https://6c49ff76-e13b-46da-8354-2e633d56f736.filesusr.com/ugd/211c2d_17ee2b87de4042b595daa331791ec8a6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3d281ee3-cde2-45f3-a37b-23fbfe8c5d7b/investment_science_luenberger.pdf
    • https://ef90beaa-bca2-431e-862c-49c19dd94618.filesusr.com/ugd/06497e_db75a37a1da64444b852c5732f7a9bba.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2f2845d7-2934-4020-b65f-546f0bc2bf8a/maluxuzorivosewekiwijotul.pdf
    • https://uploads.strikinglycdn.com/files/91276434-6d6f-4679-96dd-df655da22c0b/snow_like_ashes.pdf
    • https://uploads.strikinglycdn.com/files/c1980c29-d70a-4f07-8419-c33c1ae06531/how_to_prepare_for_interview_at_amazon.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011538.bin
5728d51798b38222f5e0990f43b204b7fe4e7d9c16f2e4c8ba7815083a446ff2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11538 5544 bytes
font_01_sfnt_off000127e7.bin
15ca9e894acfc9f499ea2d746ba4956c9fddc43422924eb10160f8a535de956e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127E7 10464 bytes
font_02_sfnt_off00014b82.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B82 4324 bytes

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