Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7c02f6736e4fcf…

MALICIOUS

PDF

86.7 KB Created: 2021-07-01 21:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4e2c6d834ab69e699e909104d5fb8dca SHA-1: 59c31133c43d4588a7009b6629baa97728a24237 SHA-256: fd7c02f6736e4fcf8a5ba512f51785e5bfe5f9be0e3705f29579f576486f7841
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of vulnerabilities to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://crewmak.ru/uplcv?utm_term=seven+theses+monster+culture PDF link annotation
    • http://devison-matras.com/upload/file/24805985109.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c9ee5b361---xawaxinamaxite.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/zofupikapivedudozupaf.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/d8161ae7b0a8a71525e1edc81f6c8189/49154648400.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/jenilof.pdfIn PDF document text
    • https://path.mn/userfiles/files/dusituxupomifam.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/rt048qcmrqati3onl1lat4gilk/kakavukulu.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b718ad945fa---89573456844.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/37937639518.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc0629c763---danuzezan.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/fe2e4c24fe309503dcb12bc2132097a4/kavutosap.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077773f8cd25---57742252388.pdfIn PDF document text
    • https://airshow-bg.com/file/233613076.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/1b6g6gdr9i7g3bvs1qi16n74a0/43817273002.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/xiwokamilifoxowuxaxur.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/d73n2ecjjoi8ktr25fa4666r3g/20839329084.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/fbcm8lng94213f6dom56pn1797/nafupezotakevopiraves.pdfIn PDF document text
    • http://flexicourse.cz/res/file/29476252362.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a773af7bc15---78206113230.pdfIn PDF document text
    • https://nestuby.com/userfiles/file/78087005110.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/xixesineli.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/9cd56cb8bf06db13a378b06246a854af/jutafem.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/75767393897.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609874895dfcc---loxafifalixexokadisefam.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc62a79289---bipuzija.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a583b25faf289e7eef9e8325d4487d98/88562898151.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__60BC068C94E90.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A3 10480 bytes
SHA-256: ed81af841fe1de4ade5c9e2e6770377ec128526eb1d9702c7f7a873ced5953dc
font_01_sfnt_off0001084a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001205c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1205C 16972 bytes
SHA-256: 7e9180782ed3e0614da6d43eec3d00f9eced0c468041a35f0d4a76464a268a6d

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