Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25d4daa4941c0c2…

MALICIOUS

PDF

78.3 KB Created: 2021-08-14 21:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ffee0d5495002f6b643e87046a5c4dcb SHA-1: eda8a24a3a6c93de0d6c71dfca1d2344a363ab42 SHA-256: f25d4daa4941c0c2fee5566a2e45c651cd34b46dc22722ded4bae20a0e7c1a9a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to PDFs hosted on compromised CMS upload directories. This suggests the document is designed to lure users to external malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/pp3vvmfl2j7e4s2d1lujq3ftm6/tejasaxax.pdf In PDF document text
    • http://foto-klub.dk/userfiles/file/pafukuxe.pdfIn PDF document text
    • http://megaeventoa100.com/clients/f/fa/fa03970f5feff24be7017758158681b9/File/23706311764.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/hkdpb1o1rvnb7fn3shgtophm0i/zobusufele.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/57892540828.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbad7a4d12---dafukapofomet.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/tutaxelovixesif.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a364e5a3ce3---23043583726.pdfIn PDF document text
    • https://maria-galland.ru/files/file/jidolejeboliwaboxigezibi.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109fb10578c8---88527207780.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/d3cd629fd9fbfc5018f0d6cdb26af112/27058855190.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16086585e76af4---45045083317.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/sawubusazezenozawine.pdfIn PDF document text
    • http://belean.pl/userfiles/file/rurapovegonazogebufu.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610732ea6be1e---pobotaroref.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/58612287097.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/wusasirawemiji.pdfIn PDF document text
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/zalebegi.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/zuzuviror.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/nefegoxadoza.pdfIn PDF document text
    • https://adci.vn/data/upload/file/zageporovakaf.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/45586708196.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8d7b271552---52564697759.pdfIn PDF document text
    • http://com123.vn/uploads/file/vagoxufepisabuxafitiri.pdfIn PDF document text
    • http://ymmicro.com/files/files/bovuxapegomitidomamexu.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/temevuwokaduso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=ankara+oyun+havalar%C4%B1+mp3+indir+2019PDF 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_off0000c858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC858 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06F 11292 bytes
SHA-256: 60bb0ec064eae2ccfc7af658af2a2d8e0494a25a5d73bf571525921c6b017e20
font_02_sfnt_off0000faaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAF 18488 bytes
SHA-256: 3b13a2ebc96c056e877469e78be8b701c164ad26a3c52154a8b9110c6609b6ac

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