Malicious PDF — malware analysis report

Static analysis result for SHA-256 626d1fd795017305…

MALICIOUS

PDF

89.2 KB Created: 2021-07-04 21:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 205865b05df8060bfdcc9c8c7f6abbbd SHA-1: c9713858d9e4c2a18cb197e23b1dcdc0d0f9df35 SHA-256: 626d1fd795017305c688803827db07ac194e1a486eed35265dfc929ab6392231
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating an attempt to distribute malicious content or conduct phishing. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://ksboutlet.com/file/files/46690268211.pdf In PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16082a7faaa4fb---48108129435.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/mn8fi2ek1220jl5p5kv0mc8ok3/dusoje.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/gepajamumuw.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/7b40d21098af01a76782f28c0276f825/14070075161.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/b5c2f4bbe2f4498384bc73d1cd9a3477/88354512547.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/1rs5u1v75n8lr8rdibkcmbrpnc/64879047989.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/f7e66fe5d50666e88c76efc05fae461d/madel.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/10494938158.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160dad9cee4aca---widirijisip.pdfIn PDF document text
    • http://beijingbeat.com/contents//files/fekililolot.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/fepejejevuwawe.pdfIn PDF document text
    • http://slenderclub.cz/ckfinder/userfiles/files/jawasigagujotifuvezuv.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/vavevagejasim.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/venaparezowegokig.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609506660903a---penalulewuzopuf.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/cjf4565u0nfkcfrlqe1hfp7tiu/mawakujibazolawukaru.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160919c9563989---dunukuzejajurevoz.pdfIn PDF document text
    • http://dashoernerboot.de/userfiles/98362993904.pdfIn PDF document text
    • https://elesud.it/img_pagine/file/tikopisedukijasimopol.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e57f2bd882---nanewurem.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c8f5dbb36---midijivivakoropaxa.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906582a227d---ragevaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=highest+common+factor+of+30+and+18PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E1 11420 bytes
SHA-256: 16ea7d2efb320b942337aaeddef1be111e570f252fe47c63d84ce125c5abe962
font_01_sfnt_off0001117c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117C 17748 bytes
SHA-256: 2a28551434e9c6023c8789b3df058ee9b7d5d4bbc54454127ca136e4e359c517
font_02_sfnt_off00013fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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