Malicious PDF — malware analysis report

Static analysis result for SHA-256 e280df5bb32cacde…

MALICIOUS

PDF

92.8 KB Created: 2021-09-18 00:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: d701597b34cd1137b002efff536a2b88 SHA-1: 94941aafca762bfc9f89776b21b77a53f2fb77b8 SHA-256: e280df5bb32cacde3244f61dcc556d9dd0bee273245878bb5bcfbb7baa503d4e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, possibly for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://ayurveda-shiatsu-qigong-nice.com/upload/files/23835778701.pdf In PDF document text
    • http://abakus-routing.co.uk/ckfinder/userfiles/files/sunaxiragilanasowovajelel.pdfIn PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/povifa.pdfIn PDF document text
    • http://xhzhengli.com/upload/32178463692.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/61516440303.pdfIn PDF document text
    • http://old.smartplus.pl/ckfinder/userfiles/files/66074883110.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1631158693.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/lonomopefud.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/gavadezelo.pdfIn PDF document text
    • https://italvaping.com/file/xadatejixuwema.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd7ea6c5f7---3767429823.pdfIn PDF document text
    • http://bischofs-scheune.de/userfiles/file/vezogajomukigesozotedila.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/9855354661.pdfIn PDF document text
    • https://comptables-publics.fr/userfiles/file/62719526064.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/96986259189.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/wuvaganiwepafil.pdfIn PDF document text
    • http://nsmpublicschool.org/slbdavbatala/userfiles/file/4262269651.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/74722785983.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/85690654829.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/voxabogiwapipuk.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/94574625641.pdfIn PDF document text
    • http://kripasec.com/userfiles/file/tetixigurudikowadak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=introduction+to+quantum+mechanics+griffiths+3rd+edition+pdf+solutionPDF 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_off0001021d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021D 18676 bytes
SHA-256: b76b80562db5874b237412c706736c9ff9efd91537abbadbba39167a8876c48d
font_01_sfnt_off00013296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13296 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AAD 11436 bytes
SHA-256: a53c5160b04cf6fbc5bd08ec008ddc93c0e0216c6acd75158d652b974f42c061