Malicious PDF — malware analysis report

Static analysis result for SHA-256 e659d26f2f945149…

MALICIOUS

PDF

82.0 KB Created: 2021-09-10 08:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: b7c870be4c2e3990143da4c34ea11834 SHA-1: 8ea91503c44ea4b6604c7747cd3b753f1607e83e SHA-256: e659d26f2f945149e6f3a70c4571f96341996bb797e871d9bc5c96701fb4c1d0
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://lemonsport.hu/upload/file/38183547418.pdf In PDF document text
    • http://tareeapartment.com/user_img/files/70328096335.pdfIn PDF document text
    • http://joinsocialbubble.com/cake/beta/userfiles/file/64226374776.pdfIn PDF document text
    • http://ecosdaliberdade.com/ckfinder/userfiles/files/ruzevavogul.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/35397774592.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/zarotilisuxuxifigalo.pdfIn PDF document text
    • http://fanghsin.com/uploads/files/202109011900087277.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/titesivabulofolifej.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/nenoripekonoweju.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/ginor.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/93789691781.pdfIn PDF document text
    • https://tssch.in/tssch/application/admin/uploads/file/13880937373.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613041c2896ee---waranufelozup.pdfIn PDF document text
    • https://www.terraton.com.my/ckfinder/userfiles/files/18420214569.pdfIn PDF document text
    • http://nrgmedia.hu/files/file/85408011000.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/88356818415.pdfIn PDF document text
    • https://majubesar.net/contents/files/32670041384.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/devuxosiwaxum.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/lulip.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents/files/pivapanexuri.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/voguditame.pdfIn PDF document text
    • https://sowlindia.com/userfiles/file/viwerutisawopuvejej.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/37132250988.pdfIn PDF document text
    • http://tuanlongland.com/upload/files/615581798.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec353325d5---gigavopemisivegopanojuze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=kho+%E1%BB%A9ng+d%E1%BB%A5ng+androidPDF 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_off0000d1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9ED 10412 bytes
SHA-256: 251c60b5ba3d5375fb03af873804303a34606834e15d8bff0cddb54ecf7799fe
font_02_sfnt_off000100ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EF 28348 bytes
SHA-256: c648b0ea7c3cd9cfe0ce37efee0b30af69535f59a2862937ad837cb51824a166

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