Malicious PDF — malware analysis report

Static analysis result for SHA-256 9744e62e541a6a96…

MALICIOUS

PDF

75.5 KB Created: 2021-09-06 23:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8c4a2298b8fab17ae86f9ef8a4b796d5 SHA-1: 73fcfb5ad4c7a63bdd1432410ed43865fb7458c1 SHA-256: 9744e62e541a6a96db575b051f41a9da48dab978a7ff31e6c250eba9a3b9d80b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URI heuristics and link farm patterns further supports its role as a lure for potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://catamma.ru/uplcv?utm_term=portside+pirates+pdf PDF link annotation
    • http://veterani-pushkino.ru/userfiles/files/minilekivenekakorit.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/db0bd8033b01c5143b09e63f98179387/wegatikexi.pdfIn PDF document text
    • http://streathamtaxi.com/survey/userfiles/files/57277817561.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ed45d27abc7---83339480566.pdfIn PDF document text
    • https://petek.biz/resimler/files/rosojodujafu.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/66578599107.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/pifixutavu.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/36319837959.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa56edea6a---44899477152.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc1c476381---difoxojugu.pdfIn PDF document text
    • http://asztalosweb.hu/userfiles/file/zejikunuberitalogare.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/veqnccettcbptgsjuaasb73205/sipasebifo.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/57455433420.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/67862421712.pdfIn PDF document text
    • http://faxik.online/ckfinder/userfiles/files/47444473320.pdfIn PDF document text
    • http://afslab.asia/upload/files/89002459334.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/mabexisufepexedabinipi.pdfIn PDF document text
    • http://jaluzipro.ru/public/userfiles/file/48509957032.pdfIn PDF document text
    • http://mlkscholarshipsmilwaukee.org/clients/f/f0/f021f13c5c598389be7e913a1ae626ff/File/75654412409.pdfIn PDF document text
    • http://expresskaliski.info/file/68606688698.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3cf325e1a---moromugi.pdfIn PDF document text
    • http://dentalcenterstudio.it/userfiles/files/fezuwimi.pdfIn PDF document text
    • http://cjandjunemillerfarm.com/clients/75830/File/ladupigotaxiz.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/fakobedigujapejupexunome.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/d737b1c53e70d74979d9f87581a7a0c4/93997031018.pdfIn PDF document text
    • http://texmet.pl/userimages/file/zeserago.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_off0000c36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC36B 18160 bytes
SHA-256: 822ee4956332e1a71096cb1937335df98b02fc36575a27d89ddb0fe99c74cc12
font_01_sfnt_off0000f102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF102 10340 bytes
SHA-256: 9147f93853b2171772e27f13b9a5e6826f52d94410ea28987cfd4c453a39d038
font_02_sfnt_off00010886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10886 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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