Malicious PDF — malware analysis report

Static analysis result for SHA-256 4967e1657bee63b0…

MALICIOUS

PDF

69.2 KB Created: 2021-10-01 04:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ccaa8938824124492fa0d06ead3f53e2 SHA-1: f9435abed3a67eaa431f8eaf7b5cbfed5aff75e4 SHA-256: 4967e1657bee63b0746bb8938879504ab25882044d75c70610f5fcda0d6266f6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and ClamAV, indicating it's a phishing or malware delivery attempt. The 'PDF_IMAGE_LURE' heuristic suggests it uses a screenshot to hide a clickable link, a common tactic for phishing. Numerous external URLs were extracted, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted from this sample, but the presence of external links and the overall structure strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://philabc.ru/uplcv?utm_term=pokemon+ash+fire+red+game+download PDF link annotation
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/fvtki3mmn5bukv33k81tbbuclb/8076286992.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/78949738997.pdfIn PDF document text
    • http://ramenhajimetustin.com/uploads/files/5849483161.pdfIn PDF document text
    • http://rs-entp.com/upload/file/8102621475.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/48636414257.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/77160537539.pdfIn PDF document text
    • https://aczv.fr/userfiles/file/waridarem.pdfIn PDF document text
    • http://polenes.cl/userfiles/file/xivifamalexuzesanuwal.pdfIn PDF document text
    • http://diencongnghiepvohoang.com/uploads/files/werufazarapanafutegide.pdfIn PDF document text
    • https://vsevolozhsk.mebel18.com/uploads/files/turuxunexavulaf.pdfIn PDF document text
    • http://mp-journal.com/media/file/14348977778.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614f743889179---9867609869.pdfIn PDF document text
    • https://avukatwebsitesi.kocgrafik.net/upload/files/xeloti.pdfIn PDF document text
    • http://matrixpaint.com/ckfinder/userfiles/files/lusiduxudiro.pdfIn PDF document text
    • http://usarsenal.it/userfiles/files/zekikuzi.pdfIn PDF document text
    • http://dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/fimagutadudisadofevalu.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/nenunemunojuteletidijuzek.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/65105494531.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/wenagodex.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/degogufezetapepov.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/sdvcmt3agb6lo2n721gqr0ke73/46091126818.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/71826303293.pdfIn PDF document text
    • https://eco-translation.ca/upload/editor/file/97320871491.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/2o29oo902jei5968p8docbbgsj/ligoxozapudir.pdfIn PDF document text
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/nifebijusuvesodefopidaw.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_off0000b01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB01A 14520 bytes
SHA-256: 762cf8aa5fc0ef709db0696981bb3f60b194d8c4ab51d96aa8aa383de44e6b51
font_01_sfnt_off0000d4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ecba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBA 10884 bytes
SHA-256: 0f7bea1aae562dc703c7fca530c02ebbb54eb6680cd1e7c653c77e7f17a86894

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