Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da7520daf4f1622…

MALICIOUS

PDF

291.7 KB Created: 2021-07-14 02:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1a99b0eea03fe7d8972e6fc8b9e1dbde SHA-1: b81cdbdc88d063e375707c9a38106f7887072076 SHA-256: 9da7520daf4f1622b3976d0b2960275e0c8268749e1ff37c66a588d9a8440c56
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristic firings indicate that the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

Heuristics 5

  • 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.
  • 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://jaukiaplinka.lt/ckfinder/userfiles/files/radomegamexaj.pdf In PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/fudabiwuv.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf1550b083---47510873886.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/xazogewizenixino.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6abbf3bc0---83096892393.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16081576b19b16---leduripeme.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/zexopefurilaviwadafuvudid.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160df0718186f2---meguwimumozosiv.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe02f7b979---37986823440.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16088ccbcb37f5---8843571586.pdfIn PDF document text
    • http://purifoy2020.com/clients/1/11/118d8b7ee1ea4bab8fb19da95c56260f/File/goromulijo.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/sunemagibabo.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/wilobaboja.pdfIn PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/degeposu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a595fe487bc---monaparutasodizonejovu.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/26c5d8866f8989f6e2735655258786d2/54989478420.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/46096225019.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcffc12be9---loxokerakirogumanuk.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0721bde00b---48233237265.pdfIn PDF document text
    • http://slanfusa.org/clients/47225/File/zonivuginazakeboxu.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/solemojoxexutonibal.pdfIn PDF document text
    • http://www.cpnatacao.pt/backoffice/ckfinder/userfiles/files/23686095425.pdfIn PDF document text
    • http://montgomery71.com/clients/34132/File/7133902128.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=real+hermione+grangerPDF 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_off0004201e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4201E 18724 bytes
SHA-256: 65d47db7de1849a6de08be02d0143d273dee96d405a2f02eebd7fba9d780809a
font_01_sfnt_off00045149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45149 10332 bytes
SHA-256: e3438a1bfe1020f85c674190f262473e9e2e6a2e2c74f79a5db23f92486a9a17
font_02_sfnt_off00046854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46854 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1