Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d4809cbdda43498…

MALICIOUS

PDF

96.8 KB Created: 2021-03-16 16:59:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 645366223dcd3c93901ef2b63c86acf4 SHA-1: b737a5c70e1852546c0b137e15ee1ccda2f465b1 SHA-256: 8d4809cbdda43498d06f964f87a20684ab8f2180b3605ca05a008e234a881f62
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains a large number of external links, suggesting it is part of a link farm or SEO spam operation. One of the primary URLs points to a domain associated with phishing, and the document body, though heavily obfuscated, appears to be a lure for a specific search query.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7447

Heuristics 4

  • 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
  • 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://maypoin.ru/award?keyword=ganapati+atharvashirsha+meaning+in+marathi+pdf
    • https://cdn-cms.f-static.net/uploads/4385631/normal_600effe6e3697.pdf
    • https://static.s123-cdn-static.com/uploads/4380086/normal_5fe2890272b68.pdf
    • https://cdn-cms.f-static.net/uploads/4422914/normal_604b77472748c.pdf
    • https://static.s123-cdn-static.com/uploads/4394061/normal_5ffb1b9b80b04.pdf
    • https://static.s123-cdn-static.com/uploads/4372963/normal_5fc80d6d2deaa.pdf
    • https://cdn-cms.f-static.net/uploads/4460055/normal_5fd2261e1dc52.pdf
    • https://cdn-cms.f-static.net/uploads/4479462/normal_601613ae3765b.pdf
    • https://cdn-cms.f-static.net/uploads/4381551/normal_60337bb9cc1ff.pdf
    • https://cdn-cms.f-static.net/uploads/4459477/normal_600ddcb030205.pdf
    • https://cdn-cms.f-static.net/uploads/4476924/normal_60256bb3377d6.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bomepexajusopa.epizy.com/53683747727.pdf
    • https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_c242c632accd4615a5ac9385fbdd79c1.pdf?index=true
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_bf281dcff8d24c3180e6ec8156126f50.pdf?index=true
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_d94973b135a74f078f7e8fd753f9c4d6.pdf?index=true
    • https://s3.amazonaws.com/gifojuxaxeva/nesutedam.pdf
    • https://s3.amazonaws.com/tuxenipup/wikefonikiloweka.pdf
    • http://mugukogegib.epizy.com/31844871801.pdf
    • http://punazujekir.epizy.com/bawara_mann_maya_nadhi_song_free.pdf
    • http://wefexafunedex.epizy.com/20641626976.pdf
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_f34311c2758c45edb9b32ec580717a33.pdf?index=true
    • https://s3.amazonaws.com/gazivemon/dante_paradiso_canto_33_riassunto.pdf
    • https://s3.amazonaws.com/mogedozara/40481067861.pdf
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00015030.bin
a1431007180ebd92880cb81b6d7ecf305dd1d1ac6c5679a3ac35f83b15fb6546		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15030 18808 bytes
font_00_sfnt_off00010495.bin
edcf74c5007e597087c082e6e3b884a9b791b5928f5a89ee8ea3619c16c256c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10495 5516 bytes
font_01_sfnt_off00011732.bin
d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11732 3720 bytes
font_02_sfnt_off00012296.bin
30dfcfb5a53aae8fd5be8fb4c7c3246053780dafddfa4b0765449e9e8ddeba17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12296 14392 bytes

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