Malicious PDF — malware analysis report

Static analysis result for SHA-256 067ae7b94bc76d7c…

MALICIOUS

PDF

109.7 KB Created: 2021-09-08 09:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f7376614e6bbba7915e690ea7a6aff23 SHA-1: d9caffd972576e5fde52ff898b5196420b173e70 SHA-256: 067ae7b94bc76d7c4e7eb6b9e4161d6c6b7b7ef39c8376b791bc6d341cf85105
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the overall structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://pistant.ru/uplcv?utm_term=18650+battery+pack+design+pdf PDF link annotation
    • http://jfkanacon.org/data/userfiles/files/mozane.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/lg1pddg29l2cnh0h3u0uqaq36g/varadodavifajigafuwi.pdfIn PDF document text
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/gamejis.pdfIn PDF document text
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/9f358280f17b5802a611b234f5347241/soben.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/ririzuwezozopirimuga.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffdf948e27---devisuzigapawexevome.pdfIn PDF document text
    • http://wujipacking.tw/upload/files/15893194183.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5bcb1e4a6---pebadoravawofop.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089778dd71f4---52759426949.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/makubafidif.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/kikomalit.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/konidafov.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/b56897e8a69224befd0e91fc803aed04/mosuvujezokav.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/xevupifakapasex.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/qogjp8p83ibo7schsdquic49ol/tetapofodifim.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/83953520746.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/suduvutubuj.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc101b3eb0e---73285640771.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/73870375667.pdfIn PDF document text
    • https://chp-travel.ir/data/file/biniva.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/gilozunoforovupa.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988b96e6408---lozixozuloxafinakivuno.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/f876eb72b85c6300c659e5796cb18cbf/mitukokosevuwivalasura.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/38ca816638cdd46de62e82fb545f3550/dewiludapurulipog.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/4799014744.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_off00014068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14068 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001587a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1587A 20040 bytes
SHA-256: a8b28778bf582bfdb1ff09a08af997bab1746ac48e94c0f5c3d33df003fc2a20
font_02_sfnt_off00018dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DC4 11564 bytes
SHA-256: 7d9a83a29ae6c44ca62d28455c3de08dfd87292c740052466ce00b785a8de340

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