Malicious PDF — malware analysis report

Static analysis result for SHA-256 e299162f8e499bf6…

MALICIOUS

PDF

92.5 KB Created: 2021-09-07 19:38:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dc40fb8de5d6109f93da799e55d90e6c SHA-1: 80eb42d10388edc6834a42c5b164cecde40931b9 SHA-256: e299162f8e499bf6e1f667d423b8064065b38a2a1ae3a5227736fe1f9b35915d
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 or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL analysis and heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://myjacksonfamilyreunion.com/clients/e/e2/e2167ce47089e9b789d53270b7cccc99/File/kasemujawegisosoxufelorad.pdf In PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/30a0d669471f119999b4b455dec6bb0e/jufuxeraw.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9715658100---gizalabogaponibogan.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/e96a01d055f7f1fde0e54b0b24fd499e/3133089537.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb59d51ba0---46579214699.pdfIn PDF document text
    • http://dzbnf.com/upload/file///60801497598.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/fufedavakusevizalapa.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/e4a5b44754a9ae2641423614f9b5b91f/xewuluso.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/86002876023.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e795a2151---34984013790.pdfIn PDF document text
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/jexomaz.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/97009552958.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/xegumavilifeteka.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/49344429539.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/40855550745.pdfIn PDF document text
    • http://myrbacken.se/login/ckfinder/userfiles/files/fodavisu.pdfIn PDF document text
    • http://brenderup.ro/mm/file/99259527187.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/videtizunilesatibiwe.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/jugasolusoxodoguw.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c6e180ab1---muwabizimanafezanogajot.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/89682410336.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d08dd8a2564---bepebubenopaseza.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210617151723.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=nsdl+new+pan+form+pdf+2018PDF 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_off0001019d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019D 18708 bytes
SHA-256: 2aa5824947ae4fe2027b82cc16660242f243861d9ac81f2c529b90a3c2b1e689
font_01_sfnt_off00013228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13228 11032 bytes
SHA-256: 364f69846bc77403b5f8bb6ff43413442511e97657da3022fa503ea02b204522
font_02_sfnt_off00014bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1