Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3cffd654b04b93…

MALICIOUS

PDF

73.9 KB Created: 2021-09-03 02:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e2b65bf759fdd3437305bac733ff1568 SHA-1: fa43a30af896873397853c10f2b1241efc29363a SHA-256: 2e3cffd654b04b93c56006f21762e8299a74160ddb2e485a26bb1f471c2e17ca
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The embedded URLs and link farm heuristics indicate a strong likelihood that this document is intended to redirect users to compromised websites, potentially for phishing attacks or further malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=waitrose+logo+pdf PDF link annotation
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160af7abe09c89---50830542579.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/15a9bd63c058011078b28c76005fe365/kakuwipoditanitazuro.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/garozivuku.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/l472i9qhmhb2i23ki62av60p8r/10951043508.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/49442374620.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b24227e3b2a---47728172409.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/36525415902.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/37566707730.pdfIn PDF document text
    • https://interior-mark.com/ckfinder/userfiles/files/numebal.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080130f39550---67490518012.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/210dd7c83faefaa83d40b9379d5bdf10/zavopimup.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfed92ad72---5535419797.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/fitofelub.pdfIn PDF document text
    • http://www.lbtfilm.com/uploads/files/nodegedusiwobejebifuwa.pdfIn PDF document text
    • https://normec-cm.com/ckfinder/userfiles/files/fadetop.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1dc3c7569c---74711641663.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16118695a7a988---tovudaduxiz.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/4c34cc62f61b1dc8da0b5c0a58346fc9/gojesazijokedobe.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfc72f219b7---83506577313.pdfIn PDF document text
    • http://recviem.ru/img/upload/redirakidixuw.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/22309248565.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce090d98b0---kilokamuzekenaf.pdfIn PDF document text
    • https://genia-groupe.fr/images/files/xukawowepogifudolifivafa.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_off0000c1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA04 10560 bytes
SHA-256: 1e2f9dbdcdc6ad9f29d55f0deb58ac8f3a0d2d8609c6e1755b45ade32c2d7d47
font_02_sfnt_off0000f20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20A 15852 bytes
SHA-256: 08e0103524fb6cd0bd1db79e8d6ee90f43d2d94a0b9f2590197937794f67aa6e

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