Malicious PDF — malware analysis report

Static analysis result for SHA-256 d38480f501ce3a99…

MALICIOUS

PDF

86.1 KB Created: 2021-06-27 15:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: b43a495201951538e42dcb7ac4fbe621 SHA-1: 398f48a076175ceefad227d11de824f75e31d8c0 SHA-256: d38480f501ce3a99fafec37993281012e88e9b6b5835c66b50516216b0648dea
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, providing no direct content clues beyond its structure as a PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://jyjwqj.com/uploadfile/file///2021060702295726.pdf In PDF document text
    • https://andrejc.si/files/file/popetu.pdfIn PDF document text
    • http://orhs76reunion.com/clients/30721/File/83494126689.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/l8qhfa3kavf618ufv0f4097ibk/kixafemofudaboluwadasaro.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609838a7f2c8f---rivetokedub.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09091368f7---bidilopubefipulobuwo.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e2ee43ce0---pukosewofeg.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b0f9d30e8---mekilasosowixas.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077411e67d7d---59353999585.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/8ea227e4735b389f8eb03f507c354165/bifuruzutesigasazawamuki.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/8964fa81f8d22a7f2980585c0c1710a3/48483386032.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/7765457642.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1300651839---rozenawoduwowep.pdfIn PDF document text
    • http://soles2walk.cz/data/file/60161784268.pdfIn PDF document text
    • https://deepankarbasu.com/FCKeditor/file/20784357981.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/4cafcdf66d44a9a5c35a395917cb182c/96052632134.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b22e9cf3a1f---dimogepas.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/supokukidibeno.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/12431348676.pdfIn PDF document text
    • http://berbun.com/user_img/file/gigodamokawolakebalido.pdfIn PDF document text
    • https://mednet.mk/public_html/upload/userfiles/file/pogukorotepu.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160cba369ac5b8---muvapunadejaxikupep.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/8deecb1825145844a9fd8dba4f893922/ziwumojobutozulerosibiri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+find+the+equation+of+a+trig+graphPDF 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_off0000e8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AB 10888 bytes
SHA-256: 6d7e2e7fe4712c08e25d49e5ca0cbf461d5957a0cd76b5d7ec8259fdc9a73ba8
font_01_sfnt_off0001013f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11951 18544 bytes
SHA-256: 63e3b5083f271ecb8aa8cb0e151b45ffa1b66e8e9159fdec47d3d6d971089edb

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