Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ba69a415f5ec0e…

MALICIOUS

PDF

71.4 KB Created: 2021-09-25 11:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 16a9a0e7cf46c0faca3ca4d124aa8ff2 SHA-1: cdbd7227754bee9aac73a54c90ed852fb58c57dd SHA-256: 96ba69a415f5ec0e5d6ae5319053adf9b7f6e313fd0e2931e3a9bdf174218b2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and compromised CMS upload links suggests an attempt to lure users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/161378d749f7de---9860786454.pdf In PDF document text
    • http://zvaracskaskola.eu/editor_uploads/system/files/73055276125.pdfIn PDF document text
    • http://servmed.net/userfiles/file/50047987871.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c3a9c6cbe---5645863126.pdfIn PDF document text
    • https://33mobility.net/uploads/files/37689152160.pdfIn PDF document text
    • https://drishtinetcom.in/FCKeditor/file/79718962643.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16141670ae7c4d---lusukajijuxeg.pdfIn PDF document text
    • http://lctrading-gmbh.com/ckfinder/userfiles/files/nafugiguteferikizituneta.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/bonatupiragojedav.pdfIn PDF document text
    • https://dreptultau.hotnews.md/upload/userfiles/files/50647903619.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/8021503959.pdfIn PDF document text
    • https://ryokanclub.com/FileData/ckfinder/files/20210924_2A317EAD15E91757.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/juvizalutuzukipeluvepadu.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161359f1f9f324---vezozabozuvilozet.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/pifunopulaxegawajelojizi.pdfIn PDF document text
    • http://digifast.cz/userfiles/namovukivetatobunol.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/29416503824.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/33785705384.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/pujagarosudumamuluta.pdfIn PDF document text
    • https://testgit.begurholidays.com/uploads/userfiles/files/48101051120.pdfIn PDF document text
    • https://brihat-group.com/assets/userfiles/files/44197966893.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/2239893831.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161319cc98500c---66061581469.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/94697717963.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/64024564454.pdfIn PDF document text
    • https://mimpishiodua.com/contents/files/84839423214.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=download+ispoofer+pokemon+go+iosPDF 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_off0000b38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB38D 10924 bytes
SHA-256: 9b8f160845d14210f592574bd65d7424fa45d8a9b6a02efb1422428e49746135
font_01_sfnt_off0000cca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA6 16928 bytes
SHA-256: 32cb1e7bda6db46a199f93162da23fd71ac912d1ebf52268da81df512d517e73
font_02_sfnt_off0000f7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1