Malicious PDF — malware analysis report

Static analysis result for SHA-256 958ae642f2f3ace9…

MALICIOUS

PDF

38.4 KB Created: 2020-09-28 19:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00c88696645855d41bf1fb8934364d63 SHA-1: 85229ac006944663f8d50ab4feb002069895a577 SHA-256: 958ae642f2f3ace98a74b2a875521defecc7ced5d2912eb47ed7a7d3ba63b3a0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links designed to redirect users to various websites, including a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a 'beef recipe book pdf', which is likely a lure to encourage clicks on the malicious links. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/mozel?keyword=beef+recipe+book+pdf
    • http://zebivefi.meganlewis1illustrator.com/uploads/1/3/0/7/130775388/wuxexovinasar.pdf
    • http://tovuteg.waysidechristianmission.org/uploads/1/3/0/7/130776445/fenonegav.pdf
    • http://files.wrenpaediatrics.com/uploads/1/3/0/7/130776483/sagubolumazugijes.pdf
    • http://fijen.lifeafternarc.com/uploads/1/3/0/9/130968979/2097f9af.pdf
    • http://files.nataliafidyka.com/uploads/1/3/1/6/131637372/mozekuzivasakubixoju.pdf
    • http://files.gifgifachance.com/uploads/1/3/0/7/130738825/6ed605a3f8e3388.pdf
    • http://files.milweeband.com/uploads/1/3/1/4/131453097/aa8f94a16a2fff4.pdf
    • http://files.palmoilinvestigations.org/uploads/1/3/1/8/131871657/banutodibu.pdf
    • https://site-1037124.mozfiles.com/files/1037124/lepekukulerefa.pdf
    • https://site-1036760.mozfiles.com/files/1036760/28654319996.pdf
    • https://site-1037057.mozfiles.com/files/1037057/berijasazosoj.pdf
    • https://site-1036881.mozfiles.com/files/1036881/pawuvalifokaz.pdf
    • https://site-1037120.mozfiles.com/files/1037120/degexavelug.pdf
    • https://bfb73dc4-3e46-4ca0-8648-42a368d4151a.filesusr.com/ugd/ee6770_748a09ecbabf47ec97446b4122745f99.pdf?index=true
    • https://d31045e2-9a23-4c49-a534-c9529f7bb350.filesusr.com/ugd/904a8b_b5aab38a25ed44f980fa4a10d5edad4f.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058b1.bin
d296f416ac70421ea5d23367a159ed8e654bbaa92482fb1d3848daede765dbf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58B1 4980 bytes
font_01_sfnt_off000069b1.bin
f3f99acd23d662e94af1804a8de4e5b6b7207177c06b3f50dc9ca847ee2e65a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B1 10272 bytes

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