Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02fe1bdc31d9323…

MALICIOUS

PDF

73.0 KB Created: 2021-09-13 19:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 449fc817db2f40a8cbbda5b3127fb465 SHA-1: 7d2dc674de9a02e6886a2e2ba8aeb7ea1d5b38a5 SHA-256: d02fe1bdc31d93235b5e58c41f2c17ad19cfa2660f0ceeea105e2e7fef97641b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with many pointing to unknown or potentially suspicious domains, suggesting a link farm or redirection mechanism. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the idea that the PDF is used to distribute links to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://iuf.kr/pds_down/files/3563711560.pdf In PDF document text
    • http://dsraxys.com/uploads/51567174007.pdfIn PDF document text
    • https://schachverein-marchhoefe.ch/fcsr/news/upload/file/95214759230.pdfIn PDF document text
    • https://tonitomov.com/picture/file/8068110626.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/34072377936.pdfIn PDF document text
    • https://dubaimotorcycletours.dubaimotorhomerentals.com/uploaded_images/files/nagefosijulixetudodagumus.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/61269270914.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/47714339957.pdfIn PDF document text
    • https://szabolcsipeter.com/userfiles/file/kotenajudax.pdfIn PDF document text
    • https://xn--psg-9lac.hu/files/files/xakeboxuwudax.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/vewaminuteb.pdfIn PDF document text
    • http://immobilier-valence-agen.com/userfiles/file/gezelafiwuge.pdfIn PDF document text
    • https://euro-m.si/web/dokumenti/file/dazaneniwujilovajanob.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/zokajumunisoxunesunenokum.pdfIn PDF document text
    • http://dominant.name/userfiles/file/87461749116.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/papemijiwubetit.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/2725504523.pdfIn PDF document text
    • http://citra.cl/userfiles/file/67215656010.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/9695087278.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/xozawidaguwiduka.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16138320af3ce9---virexelogudojil.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/40960473374.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/9691663822.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=blue+cove+capitalPDF 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_off0000bbfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40E 16948 bytes
SHA-256: 1f4801af7798e89f5159fef914d9ad6e1a35abaf953927f9035820a94d6c0f1f
font_02_sfnt_off0000ff89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF89 10212 bytes
SHA-256: a2f39b2ba64ea3dae146c0f1270b3bf75f1cb1bebb9af6fcb6aaeb23a0fa2e07