Malicious PDF — malware analysis report

Static analysis result for SHA-256 017e0b9c9f3bfb58…

MALICIOUS

PDF

99.8 KB Created: 2021-07-14 05:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1149ec74ae1bdcb79e5e1f4bcbd2ecd3 SHA-1: afb4fad86d717a17296c2b0d2e58ae9e974f41b5 SHA-256: 017e0b9c9f3bfb58dc30a2e419f445d247f88cf98077f0d37933c8a4eb14fdfe
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URLs point to a common tactic of using documents as bait for external resource access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://garglob.ru/uplcv?utm_term=chlordiazepoxide+clidinium+used+for PDF link annotation
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073e7432568e---kekeroguwidowigusilegawi.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/19772650108.pdfIn PDF document text
    • http://wenxuezj.com/images/File/5703977895.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1606f92524e77e---85679896252.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/5e114819efc7704be1ebf8a2a16851a4/94648666357.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839d457a16c---76202030753.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160740d5f5ea77---92264046570.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4bcdee484---ravuvemaditanimume.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a409811d768---korifofufa.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/juwujabosidowisote.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/8e096746575a46278d6eb5305d7af93d/robarorobamodosomer.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/07bc7c992ce87ac188b38ba17e9a2b4f/nokaja.pdfIn PDF document text
    • http://asfcursillo.com/clients/879797/File/sikagukisamuwalapa.pdfIn PDF document text
    • http://abeess.com/userfiles/file/rukilerapagisozelu.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/ludawolug.pdfIn PDF document text
    • https://aspirans.com/files/file/wexalumo.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf45e76b337---suzixivipalegavuv.pdfIn PDF document text
    • http://transsnabstroy.com/userfiles/file/86694279365.pdfIn PDF document text
    • http://dgxzz.com/uploadfile/file/12570809292.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/62d3c723ec36ade25c95264a1a14bc94/68107598487.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cee46a20645---mutadujovasu.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/bupavenageneminiwatif.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607c426c89122---bonazowegeb.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/26854293171.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_off000122b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B0 11080 bytes
SHA-256: 3899a78653fc1cc0a07f27c47c1b1cd996c7a7fede246bada21991e35aa9d604
font_01_sfnt_off00013c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15467 17316 bytes
SHA-256: 1d63187d86066ed0eaf33b38e38b56ed266474357e96c9a6e98e25808a87a273

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