Malicious PDF — malware analysis report

Static analysis result for SHA-256 450a7ea3ccc37f27…

MALICIOUS

PDF

95.4 KB Created: 2021-07-07 05:31:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f87d18fe2def14633e2678d51829e957 SHA-1: 18c7f0b7e3ea7888b37944665632a910649e3d1d SHA-256: 450a7ea3ccc37f27c31f8c051c798b60447439722e413b862d365154c2e4e739
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common technique for distributing malicious content or phishing lures. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure suggests a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608b634862956---megefigajeti.pdf
    • https://cornerstonelaw.eu/userfiles//file/77253777628.pdf
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/6f30b45f35d3ce6f834b3ab5b03c32aa/10026142530.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/fb0020b865d1d62b4f378fc96db0235a/geparobad.pdf
    • http://solyaris.pro/admin/ckfinder/userfiles/files/tirudowotunutugetenakilaw.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/8135267bb143931c62083b67775f62c1/nonezuwupipebezerolilelu.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/847c747023108238b69185816c814257/takoregusavunepemuvafitol.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2e4c2a437---40341375380.pdf
    • http://wksystems.net/HotelEstimator/userfiles/file/94464759016.pdf
    • http://mmprogetti.it/userfiles/files/pelawixajefobetam.pdf
    • http://altaprecision.com/userfiles/file/dajemejozudajuwikedokudop.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160be79f58563a---48139708484.pdf
    • http://banlinhkienlaptop.com/userfiles/file/puxawizutukevufexusovavup.pdf
    • https://autosaloncenter.com/uploads/file/77363234711.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/761d9d0f55cdaa2947f7151bd8700d43/jiganijivumel.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc7231ef57---beboganojividufobapizoza.pdf
    • http://technology-mp.it/userfiles/files/48533756640.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b52d23b0278---tikugogisuragowelabo.pdf
    • http://mamnonkitty.com/webroot/img/posts/files/jukefobovadifik.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/9dd2099387c1520e183146d155d676d5/nawovizibotis.pdf
    • http://videofilm-tv.ru/content/File/mugagaporaliwo.pdf
    • https://btegypt.com/file/wokogogina.pdf
    • http://apsons.eu/files/file/bujeforife.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/c13471d730bb44baa3ffee79e22cf60e/86994027373.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=operant+learning+in+psychology
    • 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_off00011118.bin
51c652a8d27b6b5a3044e806b0b56b85b091daf30495d81e2997fa5413aa0735
pdf-font-stream PDF embedded font (sfnt) at offset 0x11118 17180 bytes
font_01_sfnt_off00013dd6.bin
7a8e7024a3f30d7ac2a28b6ebe060d507c68abc33d727766bbde00d0492f73c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD6 10792 bytes
font_02_sfnt_off000156ab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x156AB 16792 bytes