Malicious PDF — malware analysis report

Static analysis result for SHA-256 84afe1425ab1ed8c…

MALICIOUS

PDF

94.3 KB Created: 2021-09-04 05:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0626b3bc4a6e79121ebdeda798890a6f SHA-1: 9bb4b6b23b3fc0f70ec83f533148d09e979b480c SHA-256: 84afe1425ab1ed8cd407cc58641fc445ff9cf4253b98d432ca1f17453b53de33
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://rugsinc.in/UserFiles/files/zegoga.pdf In PDF document text
    • http://pspectr.ru/userfiles/file/sevozufufavezejupube.pdfIn PDF document text
    • http://northstarbaptisttyler.com/clients/a/a4/a4b4c2e389351fb2dee96c3f727c6a57/File/48366628836.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/4858881701.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/l9to3fi7fkrg08jiqlpk9jsfpd/33692112873.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/7edb450f45c5015328bd9770300ce910/xefamitojuv.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/e85cf4818a050ff6528928f15b124f6a/kikojesoxufafegekexi.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/xivepekabarasanofekakadu.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/14171741487.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/p58nd028mrfm4d6995p72sp5l4/powazuwumere.pdfIn PDF document text
    • http://jjkxmy.com/upload/files/202107310253086168.pdfIn PDF document text
    • https://khachsan295doson.vn/namthuan/images/news/files/jokolemomadegekezotig.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/rerovufefofinukaguda.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/repowebetirifafekenag.pdfIn PDF document text
    • http://maxkbm.com/clients/2/28/28fcaa936e2ecbeb6c9a97ea0f1ab253/File/fepotimedi.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/ruzobidosokisubofol.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/28749703252.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160a9864c37507---ramuxifemudanoruditure.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/61286414355.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/68fce4fa391c33d505a0c206113c14ea/29130166354.pdfIn PDF document text
    • http://simonkuehner.de/gfx/userfiles/files/30932522569.pdfIn PDF document text
    • http://hindel-relax.ch/ckfinder/userfiles/files/98259929581.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=les+miserables+libro+pdf+espa%C3%B1olPDF 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_off0001061f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061F 10760 bytes
SHA-256: f8a1b6eda98969fd4c655fc9a9353c200c8c77b4c51c73067168a692d9900b57
font_01_sfnt_off00011e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13697 20472 bytes
SHA-256: ab3c286888ab704b2913ba1e1fcaac83eaf1572db1e457e4ba6b206d240cddc3

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