Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea80f44df6019095…

MALICIOUS

PDF

82.3 KB Created: 2021-09-10 23:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d6a84256ff83b1c530c312891997f151 SHA-1: b816d417aa8d0696cac2224119e0d6af697bf197 SHA-256: ea80f44df6019095f23d0696e65bddd4e285b14d0d4874bea4748305d548871f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm with multiple URLs, some pointing to compromised CMS upload directories, designed to lure users with a fake download prompt for 'house party apk free download'. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content, likely for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://hfnhsw.com/upload/files/42970139506.pdf
    • https://shidoremicrosys.com/media/18775294806.pdf
    • http://www.amedna.com/userfiles/files/32096838843.pdf
    • http://whatcanidoforyou.eu/publish/file/68315819404.pdf
    • https://pianotuningdarwin.com/userfiles/files/kutojibejigalogodojunimo.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b7d4bf0f5---renurojunegitejujexo.pdf
    • http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/91596334495.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388a3f9f6a4---78904071268.pdf
    • http://yizhu580.com/ckfinder/userfiles/files/554147200.pdf
    • http://opsir.eu/files/file/gixagib.pdf
    • http://premiercontainerlines.com/media/ftp/file/49011278635.pdf
    • https://himalmanpower.com/ckfinder/userfiles/files/faduwixegejuwesam.pdf
    • http://lacasedescaraibes.fr/file/rilisetovijiko.pdf
    • https://lawyerupsmart.com/tempimg/file/7751802279.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/8p14l8buir3t9rsrm2f8befrki/65139631711.pdf
    • http://giovanniseneca.eu/userfiles/files/wakevukuriv.pdf
    • https://alpinashop.bg/files/kizuvetomawelinarekewaxup.pdf
    • https://lasanisports.com/files/jonabetovanodugafa.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/ccb45e1a49e5f505cadc770a52cc665d/vamemuf.pdf
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/5d42645c8470440369cfcac41dbf13b3/64211342577.pdf
    • http://ingmontagna.com/userfiles/files/sopidowovak.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6b79cde27---zusolipotuxozilolojakov.pdf
    • https://vanphongphampmc.com/upload/files/fetipewojiv.pdf
    • https://www.institutvzdelavani.cz/files/pizudezinimaxajekepe.pdf
    • http://originalbau.hu/imagesfiles/80647885886.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/5cf982614f91f75486f86c01fdabcd99/xewuxakuxodajele.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=house+party+apk+free+download
    • 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_off0000dacf.bin
7132d818669323050725eeea729fb3d062b8e31d76db766b1f4a193b35b49436
pdf-font-stream PDF embedded font (sfnt) at offset 0xDACF 10784 bytes
font_01_sfnt_off0000f3e7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E7 16792 bytes
font_02_sfnt_off00010bf9.bin
9067faede3442b78538176b3474d1ffbe9e273a92bbbffe593f5a8dc43f498e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF9 18200 bytes