Malicious PDF — malware analysis report

Static analysis result for SHA-256 b214b79959899867…

MALICIOUS

PDF

91.4 KB Created: 2021-06-26 13:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bc9e11adf9613f7351f6321c47e06278 SHA-1: 4a02a54a8ed5bea626ebbf1922a0165826410f43 SHA-256: b214b79959899867b49ae9dd425995716b4d7bc495226f60890ee49562d99f59
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised CMS upload directories, suggesting it's used to redirect users to malicious sites. The PDF structure and embedded links point towards a phishing or malware distribution campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/98np8jng07jcb4o6hr7egc20a6/ferudatego.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/54d899247bfc414d034e20606aed62db/20494431235.pdf
    • http://kulturazebrak.cz/userfiles/mivune.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/505b1c23eb4a1788a1af07dfda54ca4f/kikad.pdf
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/b7369oc1nh10ijteoonn7pllgn/18221502211.pdf
    • http://islandpointfl.com/userimages/28575362199.pdf
    • http://xahscw.com/userfiles/file/78298072256.pdf
    • http://carzip.biz/files/uploads/files/50628631119.pdf
    • http://reanda.com/jingkelun/userfiles/files/20210601123323.pdf
    • http://www.pattyn360.com/upload/forum/files/22611314876.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/fj7en3ebjg8edp21t5jqnmeh2k/22300184724.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b09f5f718edc564a2280d230bc36f101/39963865952.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d9ae5872d---77676811151.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b70f278e0a7---rofowuso.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b330f81c210---jonikadixalabeze.pdf
    • https://kawanmto.net/contents//files/jezuxokajamutam.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/35598ff52456710415379f460d45998a/69699087195.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/343b702cb107e9c2a3f8009e902c55a2/vugagavaravekamo.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/19e687a9d69fd13e24f4ec5b9e87e452/sogadusodamijumovovoku.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcdc780d68---zopesamalevor.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc0eb23ffe---86985507418.pdf
    • http://burchiellati.com/file_fck/file/mogumokabelanaxasije.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796b36d7ce0---89969579293.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=most+strongest+hero+in+ml
    • 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://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_off000105d3.bin
a1cf1b9c9c9fadf477beda2d5a7702e21351b5ef53d178f526d3d0d7e7ca2b16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105D3 10388 bytes
font_01_sfnt_off00011d1e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1E 16792 bytes
font_02_sfnt_off00013530.bin
7815f0232c8e45e4ebeb896edfccceb5344f5249af7a917268354e4010b097d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13530 16764 bytes

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