Malicious PDF — malware analysis report

Static analysis result for SHA-256 7312f4220cf9b455…

MALICIOUS

PDF

107.3 KB Created: 2021-06-27 22:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6c6416453be07419e252e6c7860b4cd9 SHA-1: 92486642f5309a2d992c4986b00e0502c19a5f83 SHA-256: 7312f4220cf9b4557cad26c6f056ccb0303f6abf891fbdb3b064c081bcfb885e
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The presence of link farms on disposable hosting further supports a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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://arcomproltd.com/userfiles/file/galananivede.pdf In PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/c7118f946d5852dd9e3ed8899f8439de/1751691670.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160b03dbd2d011---67852460395.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/96341551630.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/524c972cb6183af17b4e6403b7a6e422/97363384762.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/e10f4c5bba565ebad8b16fc0165cf9d2/mesupovijederawa.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16094942a895d2---posozodekip.pdfIn PDF document text
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/69793913490.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083b1429eacd---25416977833.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e042d3ff8d---pofesumijejos.pdfIn PDF document text
    • http://luatsubienhoa.com/upload/ck/files/nexatomuraxokerax.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16082e7d40700a---56539684399.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/momukixukavim.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/gco7ck561vmukdepd4gcvb7v7n/94082982106.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607994fe1d579---sukovaxaxulelafutarum.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b71a6046a---57004249915.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210621_030811.pdfIn PDF document text
    • https://actorconseil.com/files/file/zemavetajanijapewixi.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/favilumodibodizisewuka.pdfIn PDF document text
    • http://kristenpell.com/userfiles/files/faxojov.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/dinux.pdfIn PDF document text
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/b0528ee7843b6352a07191b8cebe30b7/56558399709.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/f31ed1c0bc456595abedd460dddd7e7c/49615808369.pdfIn PDF document text
    • http://hopkinshigh1961.com/clients/878968/File/86053537840.pdfIn PDF document text
    • https://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/9404ca2f7d99f23a1cf223982c4cc91b/kimovabifelagurinudo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=meaning+of+convivial+in+englishPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00016c0b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16C0B 27616 bytes
SHA-256: 283f67f977d975ec4987d1c7763bd09156a8906e813777f23abd3e42c8458dfd
font_00_sfnt_off0000f429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF429 10476 bytes
SHA-256: 7c9e8a9e9bfcd2040f3bc2001edefe2975c3ccd0cd517039a0397be8f4d7d7e9
font_01_sfnt_off00010be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F6 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_03_sfnt_off00013171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13171 23912 bytes
SHA-256: 9660d45cf31055b90463898c580b6d77dd16ae090f834ded0858fb3b75cbe587