Malicious PDF — malware analysis report

Static analysis result for SHA-256 00fe6d17f655e815…

MALICIOUS

PDF

94.7 KB Created: 2021-03-30 13:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b39e77896aa4fb144f9f27b09e76f34 SHA-1: 25c2378d30b87a41e7a2c9d847dc3d78aa7e2b22 SHA-256: 00fe6d17f655e8151d0449633096c18a33e59e0a6b25ed72b001eb4a5faf4e0c
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are obfuscated or lead to potentially malicious domains, indicating a link farm or phishing attempt. The primary malicious URL identified is https://xezojetit.ru/strik?utm_term=g1w+dash+cam+firmware, which is presented as a firmware update. The presence of PDF_SEO_LINK_FARM and PDF_URI heuristics, along with ClamAV detection as Pdf.Phishing.Trojan, strongly suggests a phishing or malicious redirection scheme.

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://xezojetit.ru/strik?utm_term=g1w+dash+cam+firmware
    • https://cdn-cms.f-static.net/uploads/4465702/normal_601a63efe29bf.pdf
    • https://rafopovuweke.weebly.com/uploads/1/3/2/7/132740485/4979977.pdf
    • https://cdn-cms.f-static.net/uploads/4475397/normal_60393c1e6b8a7.pdf
    • https://zasevolonuto.weebly.com/uploads/1/3/5/3/135335071/dovugujodexo.pdf
    • https://virutabadipepuv.weebly.com/uploads/1/3/1/3/131398083/jorak.pdf
    • https://dixatuwep.weebly.com/uploads/1/3/5/3/135398053/luvet.pdf
    • https://rosolivemimej.weebly.com/uploads/1/3/1/3/131382018/webuvodige.pdf
    • http://modaxosemerevik.22web.org/lunasagid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_d34295f3166c47e1858fcef10361d3f3.pdf?index=true
    • https://29c5b005-6627-40e3-9da1-9f9d3dbc34dc.filesusr.com/ugd/7ad284_32f7c8d0c1c345fcaa462217787fd069.pdf?index=true
    • https://s3.amazonaws.com/vukusa/september_2019_calendar_printable_free.pdf
    • http://xetubuvij.rf.gd/avalon_newport_pellet_stove_manual.pdf
    • https://s3.amazonaws.com/dipafuxe/does_playonmac_work_on_catalina.pdf
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_f4e44cb04d614f3697b561d3e071f90b.pdf?index=true
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_44781a5e27a3436fa5cc7a290a19111c.pdf?index=true
    • http://wuboxobotuz.rf.gd/55174953360.pdf
    • https://s3.amazonaws.com/wetevali/nulopijaxi.pdf
    • https://s3.amazonaws.com/wexoteluwag/27797967123.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001368b.bin
0e5d9002f09b2ef7c928961e0e26a1cb3f956a605d90ff055bed0783aa58e9d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1368B 5404 bytes
font_01_sfnt_off000148de.bin
36a327222529fdb428195680276c7ebc3ed5222139744a115f88b30ec4a0d867		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148DE 10980 bytes

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