Malicious PDF — malware analysis report

Static analysis result for SHA-256 58db59d0469a38dd…

MALICIOUS

PDF

81.7 KB Created: 2021-09-03 09:15:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 014663a1b3b6cc3b90d134d93901d64c SHA-1: 5a838f15a5829da419d88d9482b2881627556d2f SHA-256: 58db59d0469a38dd2c79c4a6901ba9926aee6eb26b1da5881f3fd31c2cf99a90
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The document body is heavily obfuscated, preventing analysis of specific content, but the overall structure and URL findings strongly suggest a malicious link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://pistant.ru/uplcv?utm_term=sqc14+printer+manual+pdf PDF link annotation
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1610338cbb2ae2---96830509060.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/9gvcg06r47prvprggbd6l5h3ts/67546253709.pdfIn PDF document text
    • http://esistore.be/userfiles/file/dogate.pdfIn PDF document text
    • http://isdoor.ru/uploads/files/lagokigemibugibubite.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093d0281d7a6---78718310207.pdfIn PDF document text
    • https://srinivasagroup.com/ci/userfiles/files/42147742811.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/8dd519acad790163eaa3301c327e7539/gisobosufaxumelob.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/0adkp8m2tlek9c7f028uomlk4p/wiwumefevapenabob.pdfIn PDF document text
    • http://tlproduct.com/userfiles/file/tevamakepob.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd21ce40773---18811980744.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/53073552590.pdfIn PDF document text
    • https://redac.ch/upload/gavepezoboj.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210813_69A1F89698AACADF.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/24110392307.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/84979517000.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c975cfdbc40---ralutajoxedesarilizodagij.pdfIn PDF document text
    • https://2winit.com/Files/files/gusegebomorijubisolakub.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/tufubozatuvetavu.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/18f107b6200ae88b6b0a7a48b4857a7a/36605701933.pdfIn PDF document text
    • http://liyangah.com/Upload/file/mematofi.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1611bdf9f8cfcf---vipop.pdfIn PDF document text
    • https://silga.ca/userfiles/file/29419797586.pdfIn PDF document text
    • https://cevhertemizlik.com/userfiles/files/5942458194.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/6818367437.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7dcff9b1c6---wubupaludoretuwigibiso.pdfIn PDF document text
    • https://ncltandatbar.com/home/ncltandat/public_html/dowalumniusa/ckfinder/userfiles/files/xojimefilubano.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_off0000dd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A9 10944 bytes
SHA-256: aed141c7c041f65f358b6bf23185483a21b29ea31c21c19f8b4759c1dc16cfba
font_02_sfnt_off00010ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE0 16232 bytes
SHA-256: 9226242eeb6531c1c56c516ad6df7dde65e1d1497a94a1ea62546dd2f0e494d3

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