Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b7e504c7f78be72…

MALICIOUS

PDF

87.7 KB Created: 2021-07-01 16:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 92ba065fb1b3e0dc25fcd491f5f17abf SHA-1: b1fefa4d88ec79ce8560f3db7230274967152775 SHA-256: 1b7e504c7f78be728bbe77e37dceb08050dae09f17f061bc68efd569a50b4e0a
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites utilizing formcraft or super-forms plugins for file uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. The presence of a link farm on disposable hosting further supports this assessment.

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 https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d72b3964fa3---mofawo.pdf In PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a49a91ea0---dizuzojerujin.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/5d1dc1117d07cc2cb335039103ef0d48/tunazenugetafit.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875188097cb---xuwimisinotewu.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/051992a1d379bca54e7faffd80c48d25/89769371364.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160875f77cbf77---2094041219.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8fab5baa1---50403968894.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/7f7f2a9db3d6148b82bcaf9ca9e33134/12632076832.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/e7253f9fe54ea167d8e45b60f6615414/43221518007.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/96507629db0c8fc22ca84cdced2024cf/bixadiwerox.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a823f1e6e38---2800907415.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6397c74fdc---xobamerebukewanaxilodaz.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/c5ed257b5d187f18f6697b7dd99f9585/98075722696.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/56931841498.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160890015bd78a---96022551072.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//24340169377.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/713a28cb8c928d477002d00678eec0da/1573881600.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1464177e6---63469697532.pdfIn PDF document text
    • http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/89853155455.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/8676fh6bhv07a2j92h3j9dum53/bikib.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/zeromutixugagud.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/35354037375.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/xofatazasepegofe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=race+2+all+mp3+song+downloadPDF 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_off0000f349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF349 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5B 17144 bytes
SHA-256: abd0c474381e79eca9a8fea58b0e20e7a95d1e280a60eafb8d970f691a46f5ee
font_02_sfnt_off0001382b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1382B 10988 bytes
SHA-256: 92763494dbf03367f3c99c5758fddd6861a954d28dfcb2e2236c64e233bb7e57