Malicious PDF — malware analysis report

Static analysis result for SHA-256 25094406bbc0441e…

MALICIOUS

PDF

83.1 KB Created: 2021-09-02 16:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bad06a41d2dfbc61b970894e21130ae2 SHA-1: 2ff0da3f620e1a60b565136eae84f0374ad632fb SHA-256: 25094406bbc0441e292531813ac771f61861fe5f913c1ff3bc13c6f08f2323f5
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://garglob.ru/uplcv?utm_term=compound+growth+rate+formula+pdf PDF link annotation
    • http://jenan.com/ckfinder/userfiles/files/48012110178.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/kexoru.pdfIn PDF document text
    • https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/73164374475.pdfIn PDF document text
    • https://goodline.by/userfiles/file/37320070231.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/siqri7lfr0iu5i6b6lrgtktcvb/53321288670.pdfIn PDF document text
    • http://glotecgh.com/upload/editor/file/48157244666.pdfIn PDF document text
    • http://belovosushi.ru/files/negogoto.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160a4464093671---xisexusibafozetexerak.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/69134133222.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/6605002536.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/1d0c84ec912e8dbeaec5ea940975a98a/zudapojelives.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/56648269837.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/varadelexogugene.pdfIn PDF document text
    • https://beatmuellerfoto.ch/userfiles/files/27578966369.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a93d0c163---15275649367.pdfIn PDF document text
    • https://discovery99.com/userfiles/file/30589642792.pdfIn PDF document text
    • http://kibunajcc.com/ckfinder/userfiles/files/jekabebuxawedap.pdfIn PDF document text
    • http://robinsonsmithreunion.com/clients/879094/File/87868537682.pdfIn PDF document text
    • http://mylodge-naoshima.com/natejorinipemegoxasig.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/votumipawokenusisawegek.pdfIn PDF document text
    • http://xn--j1aii.su/userfiles/file/37748835449.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/48957832042.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/1415c9351332aface420522b92e54297/17927549336.pdfIn PDF document text
    • http://matras-devison.ru/upload/file/tawugexesanugumuzujeni.pdfIn PDF document text
    • 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_off0000defc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFC 17824 bytes
SHA-256: 1cfafe21cbc994a806d3e366820afb60cdd513bcfd31fd756090b699278788ad
font_01_sfnt_off00010da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BB 10904 bytes
SHA-256: db0bec68ad4c85f87a0536f10d41338d012f3425b83292ecfe7b39d1074935a9

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