Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4785d09457a50c2…

MALICIOUS

PDF

91.4 KB Created: 2021-06-26 10:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 19ad819affa87afc2d7cbfd750284837 SHA-1: 5e4cf16849eb95556cf1cb210904db760743a0df SHA-256: d4785d09457a50c217909366a5d6cf9052743dbc6e916ee56c371735dbf502d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The document contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://pistant.ru/uplcv?utm_term=electronic+devices+and+circuits+by+sanjeev+gupta+pdf+download
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608435fbc6ad7---13436026667.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/t5nkt8n38fsvrebo2ebd4b10b8/4720254028.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c85d3d66087---sukijufasemesabisetenavim.pdf
    • https://fnb-concepts.com/images/uploads/files/visiwexu.pdf
    • http://www.corazondelsol.es/ckfinder/userfiles/files/18599223298.pdf
    • http://i-daa-wl.de/userfiles/72078563452.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d7fd06ede---24119015661.pdf
    • https://toskov-yordanov.com/userfiles/file/wuxevilafi.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814d4986394---38270384193.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d3a18299da0---14078572211.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/1t014gsvl5v0d8gcuq00m72v3k/20289791427.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7744beac4---gizarutafoxabovabifujidoj.pdf
    • https://copperscraphandlers.com/ckfinder/userfiles/files/bikeginorodofer.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/8v29b5em8o3v7hn68pfghdbvpk/zudobopuzijufunumisibik.pdf
    • http://valsadindustries.com/userfiles/file/bofewawibe.pdf
    • http://zrdb-drogbud.pl/Upload/file/wuxalimitugodajubapamome.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/42038ddfa3681fb3d0e9ded84fb1dc69/kizabakududuv.pdf
    • https://pmeds.us/userfiles/file/84942900335.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/2e40e4fb8d8283773b181984d018c42d/wefifetopiborexurakimufuk.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608e205712250---40076638945.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b23451b5cd6---87701299782.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce143421f7---lozezabebeni.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/9e5fb79b18cb281c0d8177d2d3986742/zifuda.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/p92i9iqgfgco0gcghp25uae6hm/88529839803.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16084d95c7c72d---suwipel.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e70a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE70A 16792 bytes
font_01_sfnt_off0000ff1c.bin
b4cbb40e20dd5e32efeb6e16133a3b20535b15003b8e1945d889ac259d378d0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1C 18412 bytes
font_02_sfnt_off00012f67.bin
79f27ef1bf85ca6c198d098614f2f622ee7798d500390a76c2468bf998b64bfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F67 16060 bytes
font_03_sfnt_off00014478.bin
001ce6b3cba11c4a79ea0d6ec4aa263a9e2e7384cce3bf5558b9efe0cccec67d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14478 11412 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.