Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d8210c5173c2db…

MALICIOUS

PDF

80.4 KB Created: 2021-09-18 03:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 893440a626c9ae06c64eeab49c46aaff SHA-1: 5dcae1177da89686baec1198af38a2eec9281eab SHA-256: 01d8210c5173c2dbf3ac42e1aced821137fd64668841d9e7dee65fe64da2ab85
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs that form a link farm, with many pointing to compromised WordPress sites or disposable hosting. The primary purpose appears to be redirecting users through these links, likely as part of a phishing or malware distribution campaign. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://laborke.ru/uplcv?utm_term=pubg+lite+versi+baru PDF link annotation
    • https://www.zolmedis.lt/ckfinder/userfiles/files/33554343425.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/0qjer4pmhapssq4fslrk1rs0od/28801217803.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/vipow.pdfIn PDF document text
    • https://bunianco.com/other_files/File/fenojewowuwoleja.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ebde72eed---gufupajudanizakaxo.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/vafojosakopikelejiwulu.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/galaw.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16139355be00d6---mepinutomapenujijinizuv.pdfIn PDF document text
    • https://woft-dining.com/webroot/editor-uploads/files/vegewegiloxajavupijin.pdfIn PDF document text
    • http://laserbeautymachine.net/d/files/16057041747.pdfIn PDF document text
    • http://klgd.spokoino.ru/i/upload/files/90533555191.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/minubafowugize.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/77195645781.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/iond43sgmivj3e9vonnfffv3bc/zafixezuzedinawa.pdfIn PDF document text
    • http://ver9ctrl.sonikgps.com/ckfinder/userfiles/files/tanofufokibonetanebo.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/mewoxuma.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/rolujemekilutodibi.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/tezanumabumod.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/49835061507.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/napurerebikusalesemepob.pdfIn PDF document text
    • http://chongros.com/userData/board/file/40807506834.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/9114ad92e5bf86e70ebe6b8aaff0bd2c/gutevidalifukomipot.pdfIn PDF document text
    • https://lapdonline.org/file/fopefunuriw.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_off0000d6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B3 10368 bytes
SHA-256: d3436b1cd951eebd3192dd0ff00652a264c610b82161f6f2bca0ab99b7007cd1
font_01_sfnt_off0000ee4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001065c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065C 17640 bytes
SHA-256: 8218f4f99c0c79d33d46d0864e3f49cae8e84acb2a7517193962e7fe1d0fe891

Open this report in the interactive analyzer, or submit your own file for analysis.