Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00c24b36b543125…

MALICIOUS

PDF

74.2 KB Created: 2021-10-04 09:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3bc2ed3131d0822da27f1c159722b221 SHA-1: 1b7db025c834ff204512875c0bac043be6657198 SHA-256: f00c24b36b5431256ca62c64182fb94898f7666fee1ca5263f8199b1cb213634
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are structured as link farms on disposable hosting, suggesting an attempt to redirect users to malicious content or phishing sites. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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 https://archism.ru/uplcv?utm_term=download+picsart+for+pc+full+version+windows+10+crack PDF link annotation
    • http://archiwum.wyryki.eu/admin/ckfinder/userfiles/files/kupud.pdfIn PDF document text
    • https://robodom.si/files_vsebine/92455031206.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/80879869601.pdfIn PDF document text
    • http://e-motyle.natura2000.pl/imgturysta/files/moponexofuvariwanepaz.pdfIn PDF document text
    • http://cy2hand.com/userfiles/60803546237.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/demasujasozivepil.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/878303b27178c14d15e2f5be53d7bbd5/69666614362.pdfIn PDF document text
    • https://osiindia.org/ckfinder/userfiles/files/redawixaduxelujozepa.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/nunuto.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/jevawozizanu.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/77343421253.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/jekivu.pdfIn PDF document text
    • http://thainightjob.com/ckfinder/userfiles/files/wofekulafebexed.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/16477929583.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/45893527546.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/60163214733.pdfIn PDF document text
    • http://henca.com/files/details/file/74503925034.pdfIn PDF document text
    • http://stw-nowogard.pl/download/file/722777489.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/107911048615a9dc294efb.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/segenuwovaguwo.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/baravozezojubizuro.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210928003846_efh1dl.pdfIn PDF document text
    • https://diarch.in/WYSIWYGImage/file/nuraboxariguwokunajaku.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16141449eac7f8---30808365980.pdfIn PDF document text
    • https://cardolf.ro/files/bekiwunoxarenurepip.pdfIn PDF document text
    • http://unixsensor.com/uploads/files/202109281342545072.pdfIn PDF document text
    • http://telangana99.com/userfiles/file/57117556926.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_off0000b9f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9F2 11132 bytes
SHA-256: e1ad7e1dc6e07408eedb597b4f370ddc96135c8623b6715dbe53f93dd90b4924
font_01_sfnt_off0000d429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD429 17352 bytes
SHA-256: 829966065320e8db6ce80c4a00ea92c92d52b24634b71fce96f492891e1dc195
font_02_sfnt_off00010068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10068 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1