Malicious PDF — malware analysis report

Static analysis result for SHA-256 80388b90b2201e8c…

MALICIOUS

PDF

80.5 KB Created: 2021-09-11 11:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 68f61cd0d2d49970c6803e8736bf7c2d SHA-1: 00f45e1f42fbdf3a936575bcd7630492bf094cb7 SHA-256: 80388b90b2201e8ce59ece548d46f350147d8190b1aa4623757b4dee7a89cd14
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and external links are consistent with a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • 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.
  • 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://allytemp.ru/uplcv?utm_term=how+to+make+avatar+android PDF link annotation
    • https://lomasdelaweb.com/userfiles/2008.09/file/jegatevejelel.pdfIn PDF document text
    • http://195exim.com/datas/files/pakigedoxetaguxiworeza.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ee2a133d0---pebogibigorus.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/33922682182.pdfIn PDF document text
    • http://nuk-amro.de/userfiles/file/79300297522.pdfIn PDF document text
    • https://phr4u.com/files/senavenanalusewot.pdfIn PDF document text
    • https://digicpictures.com/downloads/55827448865.pdfIn PDF document text
    • https://pepinieramontana.ro/ckfinder/userfiles/files/73313729360.pdfIn PDF document text
    • http://clubsahdianagalati.ro/upload/editor/file/23892317725.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/40991809946.pdfIn PDF document text
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/fukubilawawejomawuxuxof.pdfIn PDF document text
    • http://bonaparte-kerkrade.nl/fckeditor/ckfinder/userfiles/file/xiwavunukukop.pdfIn PDF document text
    • http://oecschool.com/userfiles/file/39477247768.pdfIn PDF document text
    • http://rvhifi.cz/files/file/doterubilevirumogojolav.pdfIn PDF document text
    • http://aa-nusd.jp/17529511370.pdfIn PDF document text
    • http://hoclaixebinhthuan.com/upload/contentFile/file/57338651754.pdfIn PDF document text
    • https://rumputhijau.com/contents/files/68793779711.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/towufe.pdfIn PDF document text
    • http://rs-entp.com/upload/file/rorebetezilufukubilup.pdfIn PDF document text
    • https://deltaguvenlik.net/userfiles/file/ligofejuvodibu.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/48389758530.pdfIn PDF document text
    • https://flims.atelierleuthold.ch/userfiles/files/4676539303.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_off0000d83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF055 10428 bytes
SHA-256: e6b2959fa6855c2628a16642d30110e6ad85e1be9041e6d67256cb02b77f52e5
font_02_sfnt_off000107ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EA 17420 bytes
SHA-256: 85275a2ab4f5d8430bd33c20fd4d2cf9c013825411c1f5cac6b007bc1675f398

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