Malicious PDF — malware analysis report

Static analysis result for SHA-256 178f05ca7fb3f12f…

MALICIOUS

PDF

86.7 KB Created: 2021-07-09 21:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eabf113671bea9606f4c7aa8badb93f7 SHA-1: 2a3a74f0743e6d446d81b769f6c7ab9ece68e218 SHA-256: 178f05ca7fb3f12fd844ba10449e35d539dbd4726ca1b277d90a4034d4efed64
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous URLs hosted on compromised WordPress sites, such as http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608504ea887d6---12504537315.pdf. The presence of embedded JavaScript, though not fully detailed, suggests potential for exploiting vulnerabilities or redirecting users to phishing or malware download sites.

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://inwebjor.ru/uplcv?utm_term=true+colors+personality+test+lesson+plan
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608504ea887d6---12504537315.pdf
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/visewino.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/5aa343f2b684522680346f4436175afb/nanor.pdf
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/fqsgqgvc0e40dspmtbjm56e2rb/15305050648.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071532b4b6f0---25206187053.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/b824affca2b0f284d0b1308174e345f3/jozepebupel.pdf
    • http://ghrnightinwhite.com/clients/7/72/721f26fb9237119891afe8d29dbdfc29/File/bixomedexek.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b31d84d55---20876281461.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/62mtmuh7t7dqd24vtsaa01pp5l/waleniworitavojeviwetu.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/38bce04919ab6925f475a02fb536ba11/nediw.pdf
    • http://birzebbugastpetersfc.com/files/file/31387255632.pdf
    • https://aartipalette.com/userfiles/file/kosojomewodofol.pdf
    • http://safeabortionnepal.com/userfiles/file/mutagul.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/00f0ce25741f8bd3c001252cd7683ee3/fanipifasubole.pdf
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/60778767035.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b07cc0b2c66---21854678318.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078adc44b903---67878877820.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/5d486e719b7e2992741521d25a44293d/xajibam.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/jbh74uoqtuelk9p3otvsnet6o9/xiwadunawum.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d2708b94e43---87295302878.pdf
    • https://muzeumkonstancina.pl/attachments/file/zaduxixofexutovoxubage.pdf
    • http://henri-ruch.ch/doc_pub/file/6364880822.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078bf2a4edf3---nixagupelufabebupo.pdf
    • http://files.ibiza-ferien.de/file/bixoginulolu.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af7b8f94314---72283336437.pdf
    • http://vnationwide.com/userfiles/files/konegowax.pdf
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/42241689161.pdf
    • https://muratay.nl/userfiles/file/zesaz.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_off0000f080.bin
7a5ba8d41921c8ba6ad5ff1e75dba06c36cc5ec672f812089e321d26d92f6c44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF080 10544 bytes
font_01_sfnt_off000108c0.bin
48e3fc5a5a597f4c1fbbfc06ee7746ae41fa9bddee6eb9f0aeb4186146b192e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108C0 16852 bytes
font_02_sfnt_off000134ed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134ED 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.