Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f61c82bc5ceece4…

MALICIOUS

PDF

72.8 KB Created: 2021-06-27 12:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 074fff45c4933927c4434dd6b4513681 SHA-1: 8903513abba12c2c0f68b8a892df9bc8dcd00f2c SHA-256: 6f61c82bc5ceece40b43923ee8c3898db9f967b59c3ed8c706ba2a2d4d18e46a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the presence of external links and the nature of the heuristics indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://synerhu.ru/uplcv?utm_term=the+chequers+menu
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/nezenabafiloxinidulomased.pdf
    • https://mytalk7.com/_UploadFile/Images/file/51178024484.pdf
    • http://abpaluso.com/upload/file/favixukowam.pdf
    • http://www.hussco-steel.com/husscofiles/files/wuzotorugenoxejuxu.pdf
    • http://dfh-consulting.com/userfiles/file/37475789605.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160764ce852afc---36036002625.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/89pkkf19qu072hdf5sqa9nsgj7/96660362150.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/7af03b5a6a21ab4d74b93cefafefb94e/78788940357.pdf
    • http://netmutum.com/userfiles/file/79585443591.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/a76cdb0470ea644c289700c05a2accc0/49150216605.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4f5fcd63ec088415ce60f2aaf731b776/62753064345.pdf
    • https://alajuusa.ee/media/contents/file/89886013800.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608527115a7a7---2709987198.pdf
    • https://matrainagycsalados.hu/userfiles/file/sorijosisel.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b35a64586c6---67671619645.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/e81ce3325fdf28c8d5e2a3071358ffad/ziwopebow.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16087525e2f38f---61285654017.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a40d761f1f7---gekexoget.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a350e3dabe6---93857490804.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1c3prnsn2hpihes2q79u9deg01/bozavukozo.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce6027a39f---zixakod.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3812d8ce1---6014895027.pdf
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/0154c53189370a6d4be36a0bc40ea150/tumedowuvofuzexaju.pdf
    • 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_off0000be00.bin
fd8d2d5f438643197d416fc2ddcacabb6c98f2b16f904c6d132ed78e6909e27a
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE00 16276 bytes
font_01_sfnt_off0000e7dc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DC 16792 bytes
font_02_sfnt_off0000fff3.bin
faf8a66be59d4fac879139f2a2fc0769e1513296d34257b53987270ee4415551
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF3 10188 bytes