Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7221c5966fd69e3…

MALICIOUS

PDF

90.4 KB Created: 2021-07-29 21:36:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 7ed7afba218cb41f6933398eb199ad81 SHA-1: 95b9bed0db007fa0c44c3951c4be4c831699966c SHA-256: d7221c5966fd69e338b25ad03350119f358212e6fe9da1fa86973247c304aba4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://midel.me/userfiles/file/kumup.pdf In PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/87850432650.pdfIn PDF document text
    • http://menloathertonhigh1980.com/clients/6/6f/6f83464fe0b13873896cace574d4baa5/File/nikuzixidakapibopinop.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/bifuzaxagokupunujuko.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/7cdfb8d4f82f7deeb04c09ab8f25a73a/pupibex.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/49243016438.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/84286120808.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/roruwudenajawigamifenewe.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/88121392148.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/38123897069.pdfIn PDF document text
    • http://bitree.net/ckfinder/userfiles/files/lelugofixerugevebufar.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210520162440_k5ja46.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/88079243751.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc71cd5c16---44194024329.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/gedujesapiza.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/5e9a7e923c910bd2b921a1e7fabbcc3a/22022669772.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d25660750---dojopa.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/da466bae3b707ed29352fcb1d9387a5f/73703052783.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/2be6525e3e1be793faa62db8b7716ff0/71115484431.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/modemegoneguxikavafukun.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16081b45e66edc---27235075669.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609138a898c2e---jelekojiw.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/12863764793.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f2b8d119e39---4443035657.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/99537f7433f44399d2a4ace93ce748ff/61953287080.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=what+is+a+portable+tenant+screening+reportPDF 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_off0000f612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF612 10784 bytes
SHA-256: b7cbd650dbeebf9b7e906eb61c3fc97a3cf1e7762e2b46dfee69c1da5b8c3ca8
font_01_sfnt_off00010eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAA 19516 bytes
SHA-256: c2ad5bfbea03ef098f2bac5b776b9f6cb7cd8890aff9fd060a14b0f96c263bd3
font_02_sfnt_off00014211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14211 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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