Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a0d53125a8cd56b…

MALICIOUS

PDF

89.1 KB Created: 2021-07-08 02:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d673532c4085df0b700859452d91c41c SHA-1: a4e11592fc1e027b0aef1e57c5799063dcd89ba8 SHA-256: 7a0d53125a8cd56b6387dbfdad5913597966f3c1e1dc75f6964cd439e54bc86a
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress upload directories or other potentially disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the overall structure indicate an attempt to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://prairieroseclothiers.com/FCKeditor/file/pozivamenogov.pdf
    • http://onnetsolution.in/userfiles/file/xudawebemeso.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e7bb3ad10---68006169680.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c832ead64a---38930080704.pdf
    • http://richardarnoldalumni.com/clients/a/ad/ad1dcfa6f69ac51e3fe6bec18f6cf6d6/File/pijexibiseritejojenuzesip.pdf
    • https://avistravel.ro/userfiles/file/segaxalejakanuzudawune.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd8afc26fb---wakumuvetajuwuzaxu.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094b47325db9---38534145496.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/59f5b93991b73c8a0865f09b216b0e96/jutibiwopubojirozot.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16083b10bd6852---3282297760.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/cio748krlgjsnu9ocn12gfmkj1/dinopejajupofef.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160700925cfe07---liviliv.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/b108qrnjum5ihrb3crvnk7o333/75838107762.pdf
    • https://adtw1.com/ckfinder/userfiles/files/37799283179.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160af985ea81f6---99510971962.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d87f64ca54---39256051979.pdf
    • http://anatolianlgs.com/userfiles/file/59374902676.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/v9lqbm4ahv737i2r56cp5fjtf4/gelaxuz.pdf
    • http://rocb-ap.org/file_media/file_image/file/kupikutesofo.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/a491af1018f27cc6b592a8c88affdca8/xenoli.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c14ff93ad4---fudosepisepufafarekav.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f682ec4878---71683119754.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6947d0bd48---26714721955.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/1ef11hqh9586nduj77dmjbefqh/timibidabinidek.pdf
    • http://extracam.es/app/webroot/arxius/file/dezenudekowowefofu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=deadly+sins+and+heavenly+virtues
    • 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_off0000f5fa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FA 16792 bytes
font_01_sfnt_off00010e0c.bin
3f795c3765c14b51b1eb30c36eab0ce00e3c87fbe74180a95cbb01cfb6405a67
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0C 18892 bytes
font_02_sfnt_off00013f0f.bin
6e350b77b1e04273101614aeb976612aa3c8ea9a6c07555b5359c21c69d29414
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F0F 10508 bytes