Malicious PDF — malware analysis report

Static analysis result for SHA-256 47645b8a6ade168e…

MALICIOUS

PDF

86.2 KB Created: 2021-06-27 01:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5897d737fb862fa017dff7529f2d2e4b SHA-1: 34f6dd11c9e35f61b4d60be799b8f34b510b97b8 SHA-256: 47645b8a6ade168ed0aa79c4eb82d341e9fb9a45913897a6ad501663f5ea79e8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to various domains, some of which appear to be compromised or disposable, suggesting an attempt to distribute further malicious content or phish users. While no scripts were explicitly extracted, the nature of the link farm and the PDF structure indicate a potential for malicious content delivery, possibly via embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://shipsupply.ru/userfiles/files/84249831737.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/6b230a567aecc498f2987f6fec4153b0/20748474350.pdf
    • http://fashioneducation.ru/userfiles/file/47286530298.pdf
    • http://stressmanagement-karriere.de/userfiles/file/vokoroded.pdf
    • http://granite1962.com/clients/869125/File/97812164926.pdf
    • https://al-farh-iq.com/upload/userfiles/file/51859361913.pdf
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607668c572234---24652533074.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081d98c35692---betoripeluvokefow.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaef222d97b---disaf.pdf
    • https://pasarantogeldua.com/contents//files/64419665393.pdf
    • http://pension-erlkoenig.de/img/editor/file/dakamasirek.pdf
    • http://rebornfair.com/FileData/ckfinder/files/20210614_A011E0DE397408DC.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078383d0ba3d---94056125688.pdf
    • http://alnoorcity.com/userfiles/file/25404774645.pdf
    • http://puppometalli.eu/file/9836870527.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073f35f258ac---kenijumubijotosi.pdf
    • https://samtee.com/admin/images/file/85457178509.pdf
    • http://pamat.ro/UserFiles/file/59132419151.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cf84aba25---98556968345.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6244ae4f17---gevizimasojewowa.pdf
    • http://healthywithhart.com/res/file/8359888873.pdf
    • http://kangs78.com/clients/66216/File/pebixizibulorapeboforikan.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6014eba306---63622162315.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=36+china+town+full+movie+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_off0000ee2e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2E 16792 bytes
font_01_sfnt_off00010640.bin
491bc2c2e1b9953daed14d5d3c3e9d6e1438cdd3de8655a4735b544cad6b6298
pdf-font-stream PDF embedded font (sfnt) at offset 0x10640 16908 bytes
font_02_sfnt_off00013247.bin
e1a29a2840312cbce51e952edaaac944ad0da58a36936eb27d0a189c5c5f0c74
pdf-font-stream PDF embedded font (sfnt) at offset 0x13247 10968 bytes