Malicious PDF — malware analysis report

Static analysis result for SHA-256 f79a0941b224792b…

MALICIOUS

PDF

80.6 KB Created: 2021-03-13 18:27:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1fcc65144802401ec19d6ba1255052c SHA-1: 47cca5586f82ef6dc3fda2409c77af3c5e930b0d SHA-256: f79a0941b224792b1af6b289baffbfb97cf45d784a99c03e098e08a74bd6522a
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary external URL, 'https://lozipotod.ru/123?utm_term=cosmax+inc+annual+report', is suspicious and likely leads to a phishing or malware distribution site. The ClamAV detection and ML classifier further support its malicious nature, indicating it is a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/123?utm_term=cosmax+inc+annual+report
    • http://ganedoxumizaj.sportsontheweb.net/axial_skeleton_bones.pdf
    • https://bikigevoxepasi.weebly.com/uploads/1/3/4/7/134716722/tijumepeger.pdf
    • http://ruwegekugite.22web.org/tafisotikujukexerelo.pdf
    • https://xarupome.weebly.com/uploads/1/3/4/4/134469096/5ccbf9859.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bajupigirosinaf.atwebpages.com/4351878184.pdf
    • https://uploads.strikinglycdn.com/files/d4ac9da0-90d9-402f-a07b-c3d5d80ec010/mudofumosapi.pdf
    • https://uploads.strikinglycdn.com/files/d0372735-ac98-449c-adad-19f60bf868dc/jukofojew.pdf
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_25999a442a404f4889e2a39dee56d24b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a4776eba-4f13-4507-be65-5a446abb6e6f/83739088069.pdf
    • https://uploads.strikinglycdn.com/files/c83f8dcb-7772-4697-99a9-4b0adb754055/what_is_the_2_harry_potter_movie.pdf
    • https://uploads.strikinglycdn.com/files/c8df3cf3-4589-4fe1-8d48-cfda161cac49/how_do_i_know_when_my_zagg_keyboard_is_fully_charged.pdf
    • https://uploads.strikinglycdn.com/files/ae9072cf-f5de-40f5-9151-430212dfa47d/tunetatenedola.pdf
    • https://uploads.strikinglycdn.com/files/68e278e5-1766-49ec-afe3-fab709e8338d/what_is_definition_of_human_resource_management.pdf
    • http://voxixovizitu.epizy.com/96393062458.pdf
    • https://uploads.strikinglycdn.com/files/33ec6b46-c701-4226-a553-4605cdc2cf3e/84541014030.pdf
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_b7b3fb196cc343b38d805f3d0f79f9f1.pdf?index=true
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_4f0e24db22f446a99628d5a0402d2cb9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f18839c9-a3be-4236-908d-10cb595f0d55/the_witcher_3_ps4_walkthrough_part_1.pdf
    • https://uploads.strikinglycdn.com/files/dfd1a3c9-bc02-4aab-8d7e-94254255ce27/51395463202.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e2.bin
c539c9d717063026763a1188ba75439a54f67e8899a268bd33ca2a5726f565c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E2 5052 bytes
font_01_sfnt_off0000faf6.bin
d50c573fd5634c02283c9f2349ba477d49a382575b2dddd4a08fbefbfb4d6f99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF6 10764 bytes
font_02_sfnt_off00011ff4.bin
df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF4 16060 bytes

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