Malicious PDF — malware analysis report

Static analysis result for SHA-256 decf8f9aebd2eda6…

MALICIOUS

PDF

73.7 KB Created: 2021-07-09 13:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9279e09fa7f3a54b02b3b6c334a81e41 SHA-1: 446bbb54bf07a3eea63b4e3bdbf5895c420bc6e8 SHA-256: decf8f9aebd2eda6c6a8cebf1d112f9f19222d431f7b5a5ca9dd446f14e73c70
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many pointing to compromised WordPress sites, suggesting it's used as part of a link farm or phishing campaign. The primary purpose appears to be redirecting users to potentially malicious content hosted on external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=rupiah+to+aud PDF link annotation
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/7ffa67048104da6a42468d6d82e33431/zasivibejalufofit.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/ndsvjosv27698vnh7440orgr7c/wokigiluzapivokel.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/26559013807.pdfIn PDF document text
    • http://hud101.vn/webroot/img/posts/files/89080785563.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb1cfa8263---xomelaxuxevawilaliv.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/ee69106a52047558296faa0ec450bcd9/91511491203.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/95268025961.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/a65efceacc975d07f20cfc19e662b8c8/xobupavowibofokobajek.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210701191659.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160828718d3a0b---92708648101.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893e1d35640---48291533172.pdfIn PDF document text
    • http://mosjob.ru/images/file/satupek.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e49e42286f---49720285494.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/sdagfkee8kmoiei9te4c00vq42/nerojawoxusamelesonuxupaf.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/cec08a8ecee972e6bff180838725210d/21762661439.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/7fe0eb32bfff49ef50855a61cc6a8b94/89872921126.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6934ddb00---44613706783.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/99972741949.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607005ad22753---majizux.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/jidurabaporoj.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/stk0kj58p24286530q734tj4sf/nimimuwijetuxudamegof.pdfIn PDF document text
    • https://photojet.bg/userfiles/file/67239760837.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/eb16cb6631d7c1b54d086883a510fcd0/zowizuvitariver.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/14731465178.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/9gjlvimi94kic7fv0hucb2ca83/20778221409.pdfIn PDF document text
    • 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_off0000bda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA2 10084 bytes
SHA-256: 464c4e2ffe053ae1c51d4cac5805672ab989ff003eb6b987d60a1b80baea31dd
font_01_sfnt_off0000d430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD430 16836 bytes
SHA-256: f17199d749db35e9c73856da0d4563f80a0c0a698736be80578ec6109450f920
font_02_sfnt_off00010039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10039 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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