Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7fe8f91761dca6…

MALICIOUS

PDF

82.8 KB Created: 2021-09-23 22:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 65762fb18c24d2e6bdfb2a5f3fe99944 SHA-1: 23c34ecee9b317143e42a6dc9d7e5f99ca75a871 SHA-256: 8a7fe8f91761dca6e52c48a633ed8a4cab308b6440c565c22b0e6a1b7c007dff
164 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It contains numerous links pointing to compromised websites and link farms, suggesting an attempt to redirect users to malicious content. The presence of a 'download button' lure further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd8af6cb76---74646545792.pdf In PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/nerotagozil.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/kilelorolu.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/h1jl8v6l85iggqgvdfu0qhidfl/fijudafoxukuma.pdfIn PDF document text
    • https://www.wappa.com.au/siteadmin/ckfinder/userfiles/files/92477694945.pdfIn PDF document text
    • https://langumeistras.lt/i/File/widapivelupobe.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/46025322910.pdfIn PDF document text
    • http://sonnenheizung.ch/fckeditor/editor/images/file/tikafuromewudoj.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/98871696064.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/37840563109.pdfIn PDF document text
    • https://bedandbreakfastholten.nl/userfiles/file/13916176096.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/32400692581.pdfIn PDF document text
    • http://vilocom.net/webroot/img/files/binozok.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/68635052488.pdfIn PDF document text
    • http://tmtechvn.com/webroot/img/files/lorapad.pdfIn PDF document text
    • https://xn----7sbeo1acdy3adh.xn--p1ai/userfiles/file/xewoloziboduwujak.pdfIn PDF document text
    • http://universalgroupautos.com/files/others/51035022275.pdfIn PDF document text
    • http://hamdannepal.com/userfiles/file/10209836974.pdfIn PDF document text
    • https://www.meditech.cz/ckfinder/userfiles/files/gusidafuvozoze.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138b4d85d403---voziriregosikifijug.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/jasid.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/3452ae27eedf2c5723a1c2501a29acbf/fizovilutexinovinureve.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=god+of+war+ppsspp+filePDF 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_off0000e08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08A 10416 bytes
SHA-256: c272ffc6169f48166c46ba691696a8971a621910f10b62ecfeb0cda7f4b5d038
font_01_sfnt_off0000f84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84F 17564 bytes
SHA-256: 89785b9407cb3311bd3bece1108c1cf0d26299a1fddbaa1096b61d453b2216ba
font_02_sfnt_off0001259f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1259F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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