Malicious PDF — malware analysis report

Static analysis result for SHA-256 6114d1d5ea072cf7…

MALICIOUS

PDF

81.0 KB Created: 2021-09-14 10:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fd5e71081e731cceae86d637e05f1f14 SHA-1: e31f8328619afe42bb110167e5e52a4f7df59834 SHA-256: 6114d1d5ea072cf7aa3a96d1680040145cff92a1bd1c6ffbe793d93d7c859df1
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to distribute malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade static analysis. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://wastran.ru/uplcv?utm_term=free+roblox+password+generator PDF link annotation
    • http://speckletrack.com/update/editor/file/17783800608.pdfIn PDF document text
    • https://apskarota.org/userfiles/file/pesokigavarifop.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b48705d699---pudaze.pdfIn PDF document text
    • http://skncn.com/u/files/wovabamanakoxotujerul.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/40e054ff89bc6b2b4d413353267adc63/vunijerobifefadul.pdfIn PDF document text
    • http://udelimpa.es/ckfinder/userfiles/files/risezaxodajoroxuzetiluwev.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/60338744370.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/82892562303.pdfIn PDF document text
    • http://tuanlongland.com/upload/files/lukokugeduruvifoganis.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/68426604895.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/bagenerudor.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/74874661591.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6484668999.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab868c2186---miweweselub.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109030804427992.pdfIn PDF document text
    • http://bjyhyy.cn/filespath/files/20210914095102.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/61728333793.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/sepimavofemo.pdfIn PDF document text
    • http://vlajamo.cz/images/file/xumesanukivew.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/tulofudepereravaresebebib.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_off0000d63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63B 18168 bytes
SHA-256: db33b8604d3ed890422e25f08b2e13eaf4c35a657415a509a4e2b89e3bb4e83c
font_01_sfnt_off000105d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D2 10780 bytes
SHA-256: 3615afa55caa1a26f3fe359530508b3f7e53ead6c4bcd9b6eacf30086be0b22b
font_02_sfnt_off00011e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1