Malicious PDF — malware analysis report

Static analysis result for SHA-256 7333f49e3864b38e…

MALICIOUS

PDF

71.3 KB Created: 2021-08-29 02:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fc9644b15188d48a7407697ceceb6368 SHA-1: b602a6895173cc664cf52718d424011579313101 SHA-256: 7333f49e3864b38e93012bca3d1313ecbd948ead2dc1affedffaea2aaebdff57
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a phishing lure by heuristics, suggesting it's designed to trick users into clicking external links. The document body is heavily obfuscated, but the presence of a screenshot lure and numerous external links points towards a phishing campaign. The embedded JavaScript likely facilitates the redirection or download of a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 71 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medicamarsala.it/userfiles/files/62481578802.pdf In PDF document text
    • http://mfahk.com/upload/files/sirawurokagunerefiti.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/ev9maqdmns48sh36nn5bdvdml0/22079416621.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/f13f5e0d30742d40d46b7b6c9b425f61/54859168140.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608054fc5882f---23724597520.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/wifabumubesimijanawiku.pdfIn PDF document text
    • http://grandinspirations.com/clients/75274/File/nafukotewi.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/3ffe612846bc3436f1588d9f8812ce5c/29530771341.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/2369821201.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/zinorinido.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/0d4c00497dfde94d08af601baaae7b58/73409132557.pdfIn PDF document text
    • http://wsm.hk/images/files/75144004456.pdfIn PDF document text
    • http://kristenpell.com/userfiles/files/14960839080.pdfIn PDF document text
    • http://china-zzld.com/uploadfile/file///2021061602060682.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/1709350656.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/raxonitiz.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/41719102148.pdfIn PDF document text
    • http://thegioicamdo.com/upload/files/83524137586.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/31104254311.pdfIn PDF document text
    • https://cherrychile.cl/cherry/uploads/contenido/files/18894367524.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5014e1e70---mupivodexojepotulisiw.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afb1ceea7a9---91205291380.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160886cabd8368---31577531113.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/wisujiralamoxip.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/zakemamowiruwexuberafuzuj.pdfIn PDF document text
    • https://aedwea.com/upload/foto/72925615618.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=gta+san+andreas+android+for+free+downloadPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39D 10472 bytes
SHA-256: f6818452a1549073ad15681a8af9a4b9904bdf22ff866bf0ed54c6451fa9bbf0
font_02_sfnt_off0000eb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9D 14060 bytes
SHA-256: fccbd9eb4af9baf6274335d1856a6bf45327cd0bc02f589cebf1c42e0e9f9c01