Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b96e9e24249bb82…

MALICIOUS

PDF

84.7 KB Created: 2021-09-24 09:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2005a8a685e2e7cd639545f9fb625d6e SHA-1: 5722d76ffc1c20887bbbed6d5ca367c8266be84f SHA-256: 7b96e9e24249bb824c89ea11710633ab0e5adda36ef27f5cd3aabfdaa919aaf8
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 phishing or trojan payload. The heuristics reveal it functions as a link farm, with many URLs pointing to potentially compromised WordPress sites or disposable hosting, suggesting an attempt to distribute or mask malicious content. The presence of embedded URLs and the nature of the link farm indicate a likely spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/67b8802f7b9bfda0adbb708c4f441e30/wadogonepetedibutipep.pdf In PDF document text
    • https://china-glass-mosaic.vegner.com/userfiles/files/20210918_004343.pdfIn PDF document text
    • http://dhalahoredeals.com/survey/userfiles/files/28071620255.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/17547503298.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/54074440079.pdfIn PDF document text
    • http://giasuthienphuc.com/Images_upload/files/semidakobawiwewikutega.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/4ebqa5rid7tcmh8o4gr53vos51/wikazarazitidopukipa.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/75632994616.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/3342637092.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/tawezimidubopikomaka.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/23119145087.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/tuvofuxigebowirasi.pdfIn PDF document text
    • http://sculecuacumulator.ro/app/webroot/files/userfiles/files/rusewesorewexo.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/pekilam.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/39868656418.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/pesekafiluras.pdfIn PDF document text
    • https://bliznacite.dvsportbg.com/files/51703574383.pdfIn PDF document text
    • https://gencerenerji.com/resimler/files/fiwikuxezaxunojunewimefu.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/sasomosaxope.pdfIn PDF document text
    • http://eatoceanic.iorderfoods.com/uploads/files/5323724081.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/ao38jcnio496vk896g6c5j0n1j/vowiwexuv.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/59921036325.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/juzebi.pdfIn PDF document text
    • http://mibenjamin.com/userfiles/file/xopibozodovonapag.pdfIn PDF document text
    • http://trevelci.ru/ckfinder/userfiles/files/luxilazenuwozam.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/92825698662.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=2019+telugu+movies+downloadPDF 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_off0000e5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B6 11108 bytes
SHA-256: 0cf019e28384b447078a523e7a74f3e4ae62f749d0e60ef559668fbd00fe2c05
font_01_sfnt_off0000ff90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF90 17692 bytes
SHA-256: 17f3d71e120142c93dfa97b05045d053e0f69f21db6772dda9a7fd8e88bbd11a
font_02_sfnt_off00012cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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