Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7207aba8b910157…

MALICIOUS

PDF

85.2 KB Created: 2021-06-27 11:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a7de7e1229ca6ba033d12fdd37fce34f SHA-1: 9883a8467a2d16aa6172c182131ee5524e1ac39d SHA-256: e7207aba8b910157b0092327948f87f0235cb07b4a2bac4eead6ca96e127d64d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards the document being used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/40b511cf3bbac84c8d9c8286a536bed4/20812105969.pdf
    • https://deltarents.com/upload/ckfinder/files/goxozasudasate.pdf
    • https://footballsod.com/images/ck-uploads/files/toluwosovesudu.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077f16e8dc14---21217428577.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160759cb841ed8---67021504433.pdf
    • http://seoulsquare.com/userfiles/file/27131462960.pdf
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1c5174509---xaziwefubagaselowulules.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e263a8495d---94365588445.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/b88d651e2c2d132851a10c695fd716c0/84143861182.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16088650678c27---pezavudisiduripalupabex.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/5ncfgi3uerqgikk7r872t0bctn/33429741152.pdf
    • http://rhoptik.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/57538469115.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfba8f948cd---8159208229.pdf
    • http://hongshengfish.com/uploadfiles/20210624/210624215548767025l0bp6dyo5ym0.pdf
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/52d5d4195ef3ed19ef0a4a0e62473810/laranosow.pdf
    • https://myphi.biz/nbloom/fckuploads/file/zufijuwunuzosoxuvof.pdf
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/64867d4c02b30c8647fb027241eedbc5/difituzatodutujawoxete.pdf
    • http://aarogyamedico.com/userfiles/file/pazataxebaxe.pdf
    • http://apcmagon.com/userfiles/tineju.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=family+guy+intro+sheet+music
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e843.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE843 16792 bytes
font_01_sfnt_off0001005a.bin
dc277ec57f1128239dc164a77eb314e421b24e9de32dc2be195de56767a18d3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1005A 10868 bytes
font_02_sfnt_off0001194a.bin
d7c6c56587eee6bb3286492620afde27f91b73787962d363af4a155d0b7ec8bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1194A 17764 bytes