Malicious PDF — malware analysis report

Static analysis result for SHA-256 24eb6edc4e60c7cc…

MALICIOUS

PDF

71.7 KB Created: 2021-09-18 15:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b900fdf217da10ff28f19010ed2fbacb SHA-1: e39f0f21d61707f19254caa39f4d4b8970716cad SHA-256: 24eb6edc4e60c7cc9e88db090ed0e49e07dee3e8b5ef12f7a3bca6169c781a9c
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are identified as link farms on disposable hosting or compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary attack pattern involves directing users to these external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pixomot.ru/uplcv?utm_term=well+torrent+movies+torrent PDF link annotation
    • http://habitat3.eu/userfiles/files/rotadadekerigogofo.pdfIn PDF document text
    • https://smartmedia.ro/app/webroot/files/userfiles/files/basebijenonarazezeseto.pdfIn PDF document text
    • http://otestmanager.org/club/data/userfiles/file/20210916203244.pdfIn PDF document text
    • https://equinox-e.com/upload/files/5465970071.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/2892371597.pdfIn PDF document text
    • http://soosanfix.com/upload/fckeditor/file/doxugof.pdfIn PDF document text
    • http://borik.customreal.sk/data/files/24947863772.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16143bc8c5bc97---ruvototiludifi.pdfIn PDF document text
    • https://tgvl.in/uploads/fck/files/murijiko.pdfIn PDF document text
    • https://malmospelmanslag.se/userfiles/file/34695868428.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613025b074c2c---93781350994.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/71536006660.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/bexaborisuxuvodebi.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16139b33de5b50---42102398496.pdfIn PDF document text
    • http://intertribo.sk/files/nizutipexidoman.pdfIn PDF document text
    • https://wct.goldcrownresort.com/magazine_files/files/begetudofozafesive.pdfIn PDF document text
    • http://smartraoptics.com/fck_filemanager_upload/file/suwogetejorugugupo.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/savunuwamigudigixoriremu.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/tidoboma.pdfIn PDF document text
    • http://jenistudio.com/upload/FCK/file/96603504598.pdfIn PDF document text
    • http://huyminhplastic.com/upload/files/rakikapunabomerijesidob.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141db1f0b349---lolizikifejenuf.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16137e7ffddcc7---36735891774.pdfIn PDF document text
    • https://tonitomov.com/picture/file/tivilabekupuwomawilepe.pdfIn PDF document text
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/zusuzezanikovok.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_off0000b8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8AE 16112 bytes
SHA-256: a84a3512ca8fc05ea139cfa117fbc0cad40e6b7621a3a239f8fb1104dc61daf3
font_01_sfnt_off0000e1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EF 10164 bytes
SHA-256: af682f36148f6a625d8b34eda711f3e87ffd57f2753d812c62d9641077801179
font_02_sfnt_off0000f8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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