Malicious PDF — malware analysis report

Static analysis result for SHA-256 888974197a3ed0b3…

MALICIOUS

PDF

84.7 KB Created: 2021-08-22 01:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 722a678373792ab54a86b2d3eb9ab648 SHA-1: cefdd96b15052969a9897ae2db44780bbd04c0a4 SHA-256: 888974197a3ed0b39c7f50fdf69c3db00b4bed5bffa64036c293ce55d991b1fc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a payment redirection lure and ML classification. It contains numerous links to compromised WordPress sites, suggesting a phishing or financial fraud attempt. The embedded URLs and link farm structure indicate the document's primary purpose is to redirect users to malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ae9481e09---tafatesevor.pdf In PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/566f94aeb6829c5e19fc2595895ddf62/liborefepixax.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/15308055140.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7ce074a7a---relir.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160793c875e22d---96767959237.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/sokidobame.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608797b5b247c---84236925908.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/83821400855.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/lafenuti.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/82337728411.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/e7fda7127d8ec32e944a65b990ef29f0/44247948751.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b65686ac7e9---vuwutumosabiroda.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743662c3903---61220036117.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/57606996537.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ede82d97878---betunikelituno.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/10f305ec3ba8c01e63b83aff910239a3/romiritexezudoze.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/66803595617.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/b89e5430237e32276458b2fb28490bed/vojibuzewagosiduripefulow.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6af2cda0aa---69691277726.pdfIn PDF document text
    • https://twfern.org/upload/ckfinder_temp/files/20210630221058.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210728_247AA346F753E338.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102f52de9af5---seposojolajigegubalo.pdfIn PDF document text
    • http://fkhd.cz/data/img/zurifizalakaz.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/xataxoxexevif.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075abec53aae---25914438824.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/zaxumufufagibabu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=can+you+have+venmo+on+two+phonesPDF link annotation
    • 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_off0000e836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE836 16940 bytes
SHA-256: 70cca43525561766df9846cee8f53c2237cc7a1c79f1388ecc38136f7afe0440
font_01_sfnt_off00011481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11481 10676 bytes
SHA-256: e54abb5c5f4648abb9c3f60f9d046f893edd6dd4132f8e4a75d701b7d9a0fd5b
font_02_sfnt_off00012cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1