Malicious PDF — malware analysis report

Static analysis result for SHA-256 908a61d674617d55…

MALICIOUS

PDF

90.3 KB Created: 2021-07-04 11:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 363991610a9c52bcf2e6054fe0b7bb24 SHA-1: e7243764d88e9b75f0096a102f894ca65f53503d SHA-256: 908a61d674617d551fe390fc67425f9ab81223cbd28e4d550a39ec58273966c5
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d90d40a9ad1---sefazito.pdf In PDF document text
    • http://otvorene-srdce.sk/userfiles/file/36806807587.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/54t2f4tdlgki6k01gslgu5ii2o/bediwa.pdfIn PDF document text
    • https://stopserv.ru/files/file/levifebeli.pdfIn PDF document text
    • http://gtshotel.it/images/file/29903754108.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/getekikikoxaligumijir.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/jawububogor.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927c101aae0---domesasili.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/gnnkfmvilkf2ksqa6npam3kvob/vafewewakejezoxafe.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/31f54211db52c222c42e5d06ac0fc53b/jazawalifuj.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/jisupibevasel.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9903cbc40---gavigidegoroj.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/5hq884leuf9ckabudaqgftagjk/8382708610.pdfIn PDF document text
    • http://rehahomecare.com/upload/editor/files/89040806203.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/69995959988.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/fdc3b314c671334514ed5e22eb816ee5/jekakuzanugunosovipibise.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/93728879876.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c207c0e74---vokufozed.pdfIn PDF document text
    • http://carszana.com/image/upload/File/potenigozefiwano.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/gelukamilovixinupizujoga.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d82f4d2b5---27112386898.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/42514457076.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/vodexuzitikiniwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=coloring+pages+cars+and+trucksPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000feae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000116c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C5 10912 bytes
SHA-256: 0c0d395893050707711c4a5fe9f8aa966850b3dd2415537b97b74b0ad96d37b6
font_02_sfnt_off00012ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFA 16936 bytes
SHA-256: 63375de7f55e03225fe8700ef123639ce83902c804ad1e8cda67ca96ef2aa6b3

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