Malicious PDF — malware analysis report

Static analysis result for SHA-256 149de130fc1f2c63…

MALICIOUS

PDF

84.4 KB Created: 2021-07-08 03:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2a460271340b927f3f38079760328512 SHA-1: d89edbeaf3d9b55c7d80518a6c3c073fef20bc04 SHA-256: 149de130fc1f2c633383b4918d22326e8f2dc6f35c74cf4955d1b0b07c72afcc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially harmful websites. The presence of compromised CMS upload links further indicates a malicious intent to host or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://smidgel.ru/uplcv?utm_term=the+power+of+imagination+neville+pdf
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fuvematoxuzaginima.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/153db9f71ef0f4902b107eb661c16fe0/87466628993.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886ff306b0f---34748970049.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/c4295364cbb575108d26ff2e8a4242db/wokevunepasevelafot.pdf
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/4snvrdllflbmjnecpk2pvpl1tq/robosometex.pdf
    • http://csc0451.com/userfiles/file/20210624062132_3egz1j.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/ej92n57228d1bn48pbqv9ljpc4/lelil.pdf
    • https://healthmatters.me/userfiles/file/68264299917.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/928925fa4c177735316b58f24149f3f3/siwotaxunosasujome.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093101bb3158---fugogixive.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090733586eda---32440555785.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/lnboib4j6bcveu5vprrj48n56b/xipize.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/2a18f26afa753dda9669047efa7577bd/punubukitatijewolaja.pdf
    • http://www.ecvbrass.ch/user/web/file/niwetejevodiponok.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094482d5cd5b---favagazux.pdf
    • http://www.allatpatikapecs.hu/images/file/21664725943.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/a00b4n3d0uo8vojo2dv2tv5tdc/somudo.pdf
    • https://bbmint.com/userfiles/file/ruvopekidokapebarazagibi.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb00d8882e---71600632945.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608a97eb0a713---88959697178.pdf
    • http://honyi.tw/ckfinder/userfiles/file/14061531044.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608628d5eee95---21782779184.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://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_off0000e9e3.bin
002dea654686508d0e620dae067fec8edcdb373836beafbe903844ef2d5e4974
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E3 16236 bytes
font_01_sfnt_off0001138a.bin
37a7bb995fe934b0edb776e8265f713e762fc5f85f4fcbc2ff802491f9e56d0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1138A 10892 bytes
font_02_sfnt_off00012c66.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C66 16792 bytes