Malicious PDF — malware analysis report

Static analysis result for SHA-256 02bb0d6eaed824c7…

MALICIOUS

PDF

79.7 KB Created: 2021-09-21 07:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bbcbd08d95be6443c34eed1efa07814c SHA-1: d8ab02bc1d7f2873f7fb42febcfa79733687ec47 SHA-256: 02bb0d6eaed824c7817c8b53c17b1a468c10d18adb49236a55740d9b3546a557
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=mi+game+launcher PDF link annotation
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b8be32692---jumuzidaxudiridajemiwogag.pdfIn PDF document text
    • http://ahdjcm.com/upload/files/kenexolamo.pdfIn PDF document text
    • http://iucecb.com/files/file/585181126.pdfIn PDF document text
    • https://angelsolutions.ro/ckeditor/ckfinder/userfiles/files/megekidevejuz.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/2834581013.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/74285057359.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16143002e47e29---tolodanawob.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/rakepepiruwiganojup.pdfIn PDF document text
    • http://riviera.az/userfiles/file/gisafobukogapuxojixujo.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/riwemujes.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/75550477705.pdfIn PDF document text
    • http://uralteplostroy.ru/content/file/62511617829.pdfIn PDF document text
    • http://svadbavmoskve.com/content/xuploadimages/file/lumewoworuti.pdfIn PDF document text
    • https://www.tocbirsen.org.tr/ckfinder/userfiles/files/telidowi.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/rijamakesalipifaleni.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/sazonesixofasolaxigojipit.pdfIn PDF document text
    • https://sikdercollegeofpharmacy.com/scp/ckfinder/uploads/userfiles/files/32000832000.pdfIn PDF document text
    • https://henseltech.cz/userfiles/file/22366571347.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/38694992888.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/duxepinefuxek.pdfIn PDF document text
    • https://regiefranchet.fr/userfiles/files/10794734840.pdfIn PDF document text
    • https://equimat-cheval.fr/file/rigunovojetinak.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_off0000d341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD341 18516 bytes
SHA-256: 5a22e952d70259c2b2a4f30873c4205c3f0208952c85e255bebadb77234798c4
font_01_sfnt_off000102b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B6 10384 bytes
SHA-256: e0b9b6fd680ae03cdcac0f79e1816a43b84c34a3d9ecb4ed93b8914ba89dcca6
font_02_sfnt_off000119ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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