Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bf5ade5553d0f22…

MALICIOUS

PDF

121.5 KB Created: 2021-06-27 08:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 63878dd97dd694e2410fc5c1305047a4 SHA-1: ba1a017633e087eb3cf31836d8d71ab30075792b SHA-256: 5bf5ade5553d0f225d34101e1fe79c422aef07a7780a92651908ad3adc400d9d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The document's structure and embedded URLs strongly indicate a lure for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609492372d4b6---wazixopavasuraxidesiku.pdf
    • https://bhsbeacon.com/FCKeditor/file/wopanivozexovibina.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160adcd23a85a2---dirazomituvu.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/5vqpibp0b3ttsr0qakqts38hir/99950663620.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/f606020d559276b54e81634102613c1d/97533044309.pdf
    • https://skyzoan.com/cake/beta/userfiles/file/5559730740.pdf
    • http://asckhn.com/acskhn/userfiles/file/filulusitomu.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/a44d76f04b6b767eb588f6e75e152a61/favasixukovi.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/78d55b464715a64bed832a9508a41967/vizokuxof.pdf
    • http://cmtdental.com/upload/ckimg/files/begopovoduk.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1541f14e92---wekofi.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a68826aa7ba---26822877230.pdf
    • https://dodatnagarancija.com/userfiles/file/36171168070.pdf
    • http://dmhu.eu/uploads/uplib/file/24701527920.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6ce79ba8f---37532914144.pdf
    • https://airshow-bg.com/file/22984765497.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eeb3f2ffb7---24435737151.pdf
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/9olgjepb5s6nndd1fnb4l4s0vf/70954758207.pdf
    • https://debcopharma.com/userfiles/file/wedar.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/416541e02a46d4284d46f12a10bc0b8d/38387933038.pdf
    • https://optimustelecoms.com/ckfinder/userfiles/files/9054303004.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a11825b7c7c---nusuxabipawuzinadefiw.pdf
    • http://alliance-ltd.com/userfiles/pukezaj.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=wheel+of+fortune+living+things+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001626b.bin
23191a20989a09959b2cbcbcedb805b598ca26499a9d836ac043174a76a4ddba
pdf-font-stream PDF embedded font (sfnt) at offset 0x1626B 16428 bytes
font_01_sfnt_off000178c9.bin
fb0332d1497aac768c805e497577c63a03074faa22e84637028655b4c4518b0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x178C9 10740 bytes
font_02_sfnt_off0001918b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1918B 16792 bytes
font_03_sfnt_off0001a99d.bin
0358a5b43cf8697bd5a186ab164dfadc22520834b85a4e86c49dc4d44e435ee4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A99D 17720 bytes