Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff294e6661ec0ac6…

MALICIOUS

PDF

95.9 KB Created: 2021-06-27 18:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2a60d7211fb8b46f7e2e71e9ad66a517 SHA-1: f359d4b0b2c8d1575c2a16159b42d85b15be7b7b SHA-256: ff294e6661ec0ac6166fb4710f791f69164592c2bc8f5eaa75fccdd11bcf3de1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS platforms, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of numerous URLs and the 'link farm' heuristics suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://ajivikafinance.com/userfiles/file/furibikipadazew.pdf In PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b86b9aa49b1---nijedefotizaxemumero.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/79118290722.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/b0da35ff0365dd455db5da556d0ceb38/suriv.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/134f2d974e87edd83ac0890b29b90ce3/96930271961.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/9d9909n1eh21ihiq43sfku6fe0/16426449598.pdfIn PDF document text
    • http://www.oiseaubleu-promo.fr/userfiles/file/kuvisodutenedemimusuken.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/fuxazezokex.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/kiniwolajesazugilowuvom.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/68418355777.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607cac9231f99---30116053306.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b174589d44---xojije.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/a7d1005e25bba0349da42f7a323e2f41/gukipegozirixopofarozu.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f91a2e2d14---92200413194.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/c513ecb76065c026b1dfdd2813954d1f/95483291048.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b88e11ea0a---74514180858.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/tovobijeletixawamemuxi.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/7d19e66d114ca000b1a8ce070376bf6f/37765115024.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/17528003133.pdfIn PDF document text
    • http://4bx.pl/public/file/34771009035.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/71083803273.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5f9bb2f01---daluxibiditu.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c530d88eeef---fidune.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/4541ec3195580a80f093aae080b60e93/tezatu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=cranial+band+costPDF link annotation
    • 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3E 17740 bytes
SHA-256: 68732a79e54f034896fe463067c52d5fc29cebe47a7e658c30a64bf76c45a455
font_01_sfnt_off00012b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B15 10404 bytes
SHA-256: 46c68fe259b4927c8620201f9c2bc5a751e2e288300ae71aa2e3e3fb7abe7842
font_02_sfnt_off000142b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142B3 16248 bytes
SHA-256: 6c7e1b754cf38ee70ad76cb780c90d71dc4ff6fc3e14eab78a91c98fc4406452
font_03_sfnt_off00015883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15883 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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