Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c6f206bb91c10f…

MALICIOUS

PDF

82.0 KB Created: 2021-09-16 12:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 802bcefe6a9ac5c60dacddf750edbea6 SHA-1: d790c4362e79d4afc9e130f690394a4085804cd5 SHA-256: 80c6f206bb91c10f7bb66c31238cdf8e0706a0e553b83b64672c531611eabce4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to function as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://medvor.ru/uplcv?utm_term=open+pdf+in+kindle PDF link annotation
    • http://mundialimportweb.com/userfiles/file/41362546543.pdfIn PDF document text
    • https://o-dance.com/upload/files/5167390460.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210914025954.pdfIn PDF document text
    • http://debnine.net/UserFiles/File/buguxegatog.pdfIn PDF document text
    • http://euskararenginkana.eus/files/galeria/files/fodisubaribofamutufi.pdfIn PDF document text
    • http://romovi.net/sgi_userfiles/userfiles/files/posolidaris.pdfIn PDF document text
    • https://alariel.be/userfiles/file/45596517437.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/83965647234.pdfIn PDF document text
    • http://progettocecinacuore.it/writable/public/userfiles/file/41699656855.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/xoxurixebiwibeju.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/24225250487.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/papeb.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/22807324989.pdfIn PDF document text
    • https://procogs.com/FCKeditor/file/38689138839.pdfIn PDF document text
    • http://giga.sk/storage/file/11283633466.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/gunokepupemidozibefoxero.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/fixilanitojafija.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/66012047375.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/99800191308.pdfIn PDF document text
    • http://aweibel.com/Photo/file/tedaba.pdfIn PDF document text
    • http://gibisch.com/files/files/77176225487.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/botufikisuwolutoxudovo.pdfIn PDF document text
    • http://citygclub.com/ckupload/files/jexivubazixaw.pdfIn PDF document text
    • http://dlugopis.kbo.pl/ckfinder/userfiles/files/wutijatulopusobu.pdfIn PDF document text
    • 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_off0000db3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3E 18804 bytes
SHA-256: 5d21f250298f27944d2552fd6b8ca60321d34f37f2bfdd140bf2e440f48f1c73
font_01_sfnt_off00010c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12470 9960 bytes
SHA-256: 16742f0820ba3cb6dd5acf22de017105204b9bd05ab7cf554bcc856eccc42013

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