Malicious PDF — malware analysis report

Static analysis result for SHA-256 627329193480645e…

MALICIOUS

PDF

81.6 KB Created: 2021-09-08 22:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3f0264ee37d4c1f179a9de3bd08400b6 SHA-1: c51f659f7581e3b64d4a151dd859500259a6d784 SHA-256: 627329193480645e7c36fb44ee675c2697545cd21e9e8fdd52ac8698dd8a0985
216 Risk Score

Malware Insights

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

The PDF contains numerous embedded URIs, many pointing to potentially compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The 'SE_REMOTE_SUPPORT_LURE' heuristic indicates the document likely instructs the user to install or connect to remote support tools, a common tactic for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://infrive.ru/uplcv?utm_term=how+to+do+screen+mirroring+from+phone+to+laptop PDF link annotation
    • http://gandolfiarchitetti.com/userfiles/files/21891148579.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161327760dba2b---matedesoritinip.pdfIn PDF document text
    • https://lecachet.fr/docs/files/40183636922.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/8573514190.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/36470113756.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/89143861761.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/81386330010.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/2703408889.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/netetepofumirupepovo.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613034a40a7b1---gasuriwiwaridibovoz.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/luwimefud.pdfPDF link annotation
    • http://fishingas.com/userfiles/file/81625533169.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f96488dfd---31524421165.pdfIn PDF document text
    • http://notar-frings.de/userfiles/file/jopipupulati.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/kekalofigodejiwufexexiw.pdfIn PDF document text
    • https://jdsliquorlocker.com/nbloom/fckuploads/file/44436385786.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/37f8396d531ff2398f8c2607c94d5c3d.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/lonufoxokenivafuluxiz.pdfIn PDF document text
    • http://francescofesta.it/userfiles/files/36031287037.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613257c077c33---bavijesiwokufujigagupeso.pdfIn PDF document text
    • http://zensushidanapoint.com/uploads/files/15798110467.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/dezapekulamolu.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/98604309132.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_off0000d897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD897 17992 bytes
SHA-256: acaa44d7c809bc3f80f0e6f9f4c066183d5dcdc6889f6354c526c22d1601ba0a
font_01_sfnt_off00010694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10694 11144 bytes
SHA-256: 582dfce01910ee5f103ca9d5c0bf8be22bcea52c71706543a3078daa6fb6f868
font_02_sfnt_off0001203a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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