Malicious PDF — malware analysis report

Static analysis result for SHA-256 4416dd65dee6d011…

MALICIOUS

PDF

91.8 KB Created: 2021-08-10 08:27:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 19337a3a929cddf87ba0fe805d046f1d SHA-1: 69445cd2cb1d75fe27107565c74b56627cc133df SHA-256: 4416dd65dee6d011e5fa88a789b74a4f93d7616cdabd3bbf62e3e9caa006a4de
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The file contains a link farm pointing to multiple compromised CMS upload directories, suggesting an attempt to distribute malicious content or conduct phishing. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160add5f12e5ff---42018166039.pdf In PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b026799d32---powudutavatiwanitune.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/54742383587.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/8831861548.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/94101728195.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/13826491946.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pudovolofumoxakura.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad80ba2355---ritebawinej.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d117c304c1---86648961517.pdfIn PDF document text
    • http://abwessex.com/uploads/files/lorujuwafapotodu.pdfIn PDF document text
    • http://xingyeknitting.com/userfiles/files/gofuxevigametoxokomikakol.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d84198a6f6---kepibigotufagan.pdfIn PDF document text
    • http://sns.hu/_user/file/48629425589.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/48gjtc8d95o1uft28ntb34cd71/raxaf.pdfIn PDF document text
    • http://sladkiy-ostrov.ru/userfiles/files/kirejobutezapadenodi.pdfIn PDF document text
    • http://greenmodels.ru/uploads/files/40060429003.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb474388f1---xejemepijabukixil.pdfIn PDF document text
    • https://suprastoc.ro/userfiles/file/javuwafofupexofuladu.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/79445362685.pdfIn PDF document text
    • http://bjjiffy.com/upload/pexojiwalijelimunalu.pdfIn PDF document text
    • http://adbrf.com/files/fckeditor/file/53664596760ff4d53dadca.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160762e28f3aa7---gotosuboxumirob.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2f6aab773---fovozitimisaba.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93c1c352f5---8355707700.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/iog8k8ajbjmbsjmu9ghiulb76u/parakoleluvokoxoxito.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/44563281260.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=tupac+mom+net+worthPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0B 10480 bytes
SHA-256: a49a513fbcfa1fb739b228cf7215c8a649f370cbd658cfa3a070d8ca82121b1b
font_02_sfnt_off000131b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B9 17948 bytes
SHA-256: 4519718f3b11b443d49d6039ec7ed6c18d47a22d58ae916f1bc1e9c4830acb17

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