Malicious PDF — malware analysis report

Static analysis result for SHA-256 9270b17a924821f5…

MALICIOUS

PDF

85.8 KB Created: 2021-07-20 07:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6982191e127ec0c45e43c724b0d1c270 SHA-1: a35a06a4b5573aa31a6399fc07a29f72be20d6ab SHA-256: 9270b17a924821f5ff72b6bdcbf966bb19c0196e4a795571aef8183eb748372d
164 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document contains numerous links to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to distribute malicious files. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/479d7bb438d3931172debfcf9c1f8bef/21152743097.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee62823d88---423619463.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e4384c5b2c779a1f9ded020115e4e594/kogipixeri.pdf
    • http://amandatravel.com/userfiles/file/85057555881.pdf
    • https://lecachet.fr/docs/files/48656403989.pdf
    • http://airconbank.com/upload/fckeditor/file/44992732.pdf
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/gufudolevabigaritoj.pdf
    • http://luxmeterthai.com/ckfinder/userfiles/files/busovurora.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16093a8d3a2ca1---12170088816.pdf
    • http://sun-green.eu/ckfinder/userfiles/files/sabijutefurib.pdf
    • https://topaldanang.com/uploads/image/files/zibosan.pdf
    • http://timandlor.com/userfiles/file/zefumezitanodaxolatejowor.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/3812284926096b08059d62.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16087bc40e7bd6---87806771598.pdf
    • http://hilltopperalumni.com/clients/9/93/936f23dc4abb03f6d4a1aae2c8a32781/File/6777416634.pdf
    • http://maytinhtuyenquang.com/home/maytinhtuy/domains/maytinhtuyenquang.com/public_html/images/file/51100932318.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1100c7597---tugiwikifazukusesepiga.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609473248bca4---wisitabagesumilaloveme.pdf
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/mugut.pdf
    • http://www.aqsclimited.com/EditorImages/file/72202863490.pdf
    • http://teifsepahan.com/files/file/ninozoli.pdf
    • http://www.hussco-steel.com/husscofiles/files/nelotefibudo.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/trkji8dibb76fjuq2bjedonkor/mupomupogalijidir.pdf
    • http://rainesclassof1980.com/clients/3/31/314d3ac3c31ee16cfc8f78d457af0ebc/File/75105954367.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=ps4+sniffer+free
    • 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_off0000ef96.bin
3ed36d2639609f8f54f6daea3b651eeaf34c83f0136acebbdbb287b460b5774d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF96 17088 bytes
font_01_sfnt_off00011c7b.bin
2c2f0d14010f94cf2d288b86c3ed904f77c65902cd0fd39de8423665518cc767
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7B 9860 bytes
font_02_sfnt_off00013249.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13249 16792 bytes