Malicious PDF — malware analysis report

Static analysis result for SHA-256 33216245b3f8646a…

MALICIOUS

PDF

97.3 KB Created: 2021-07-06 21:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 49280947cd5f87c8bcd9c5fe73ae481e SHA-1: 03aa71af3a4d576f9172ca3fac3e9164cc17a116 SHA-256: 33216245b3f8646a768f5d1604422d1395015a980157d589beae855cf4d4b59c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to trick users into downloading further payloads, likely through a phishing or social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://cu-hinothai.com/ckfinder/userfiles/files/47458317758.pdf In PDF document text
    • http://bajcsidavidfoto.com/_user/file/31089711315.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160e18287dd0ce---9528046895.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6193b13068---fitikobegokodopeb.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc96945acb---15175886223.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae0052f902---22072761186.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/golokogifovoxajunadu.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/nodubefomusotive.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/pubokufofuw.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd99d628b30---ranewapo.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8c9cd3fe8---tuvax.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bba0624566---xewenokemedaw.pdfPDF link annotation
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/xozezatomobokipakodemeb.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/81313751809.pdfIn PDF document text
    • http://zivotzaokny.eu/res/file/suridiwebeguwakojarufeb.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/71879623076.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/dddbd7cbbbc95f12eba5d98e582fefd8/wokavo.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/19480758064.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/4d558342cb9a244009a7fbc18da15007/99609398883.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d20b6a848f8---solidokofijase.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/535a631dca9b4b8aab187b8e1826cdf1/26499706776.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c639e23c73e---meganijenavekagududoga.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/e1snrlh11qsl1s0a3piduknjan/22920413950.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/35348453232.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4b694cd46---68664886828.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5786d22545---53298659706.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=504+absolutely+essential+words+test+pdfPDF 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_off0001144d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144D 19124 bytes
SHA-256: 8694fe65b14959faf2d19dcc48f1fba0f7a764d1d0212b47c145d6b14c8c7234
font_01_sfnt_off0001453d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1453D 11168 bytes
SHA-256: 50ba8dc0736392fdf2903c18824f88367bc38c9655a6c5e94dfdf7eb6ba19716
font_02_sfnt_off00015f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1