Malicious PDF — malware analysis report

Static analysis result for SHA-256 206ba491ca49169a…

MALICIOUS

PDF

85.7 KB Created: 2021-09-04 01:34:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ce1514a2cee1e6f9021d0bc7e4e5998 SHA-1: c8db1b418c754bb6fba99372e9f4f2170dd0d553 SHA-256: 206ba491ca49169a2d47e6c896a10013a139bb43ebc7fe8555d8c3a753a932a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish users. While no scripts were explicitly extracted, the nature of the link farm and the detection as a trojan implies a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1e98540a4---papewadagoputedesa.pdf
    • https://subarini.ro/mm/file/88973716045.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5db801fffd---fuselafuluwotilumufure.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2d9431a54---vajerutefapunifobeturu.pdf
    • https://abe-rdc.com/userfiles/file/kelijakiludiwilalanepe.pdf
    • http://sumterhigh89.com/clients/863574/File/vekud.pdf
    • http://cuahuyhoang.com/media/ftp/file/jajizelexulorikedifusor.pdf
    • http://zonweringnederland.com/ckfinder/userfiles/files/46322789522.pdf
    • http://capitolmetrophysicaltherapy.com/files/files/93224816006.pdf
    • https://mygo.com/ckfinder/userfiles/files/50942365614.pdf
    • https://bosingels.nl/ckfinder/userfiles/files/45878918447.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a5f73ad4e---47778463413.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077aeb4abdc8---54861038379.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e2966785f25---41598856616.pdf
    • http://michalpavlicek.com/uploaded/file/65783077423.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef64a05823---gasadigapo.pdf
    • https://apz-arte.com/ckfinder/userfiles/files/tasetawizoboz.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/4c524be531af4ac4ca9bb6cbbca03640/73383905234.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ab70be336---54171379202.pdf
    • https://ajitcoatings.com/uploads/xetedof.pdf
    • http://kapsalonindex.nl/images/uploads/didoxanivim.pdf
    • http://colescastle.com/clients/875019/File/6371015294.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=instrumental+quirurgico+cesarea+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_off0000e83a.bin
02969486b1953b2bce179ef422c3937414ebe600e74fa7558d7fb796f39127e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE83A 18360 bytes
font_01_sfnt_off0001178e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1178E 16792 bytes
font_02_sfnt_off00012fa5.bin
96f3715846cfabb4b39fe1fe7674f545177a7e4b2acde4049c28c95387c47649
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA5 11160 bytes