Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f1cdab2590675a…

MALICIOUS

PDF

80.0 KB Created: 2021-08-29 16:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8c31f4ff57f871d10915fc1a4dee271e SHA-1: 7852d61fb42421e8e2bf5ce0baad18c9aa05e661 SHA-256: 60f1cdab2590675aa16347f582fa1660e9eed6472f2290413f86180e1f4e0247
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs suggest a tactic of using link farms to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 http://consoles-a-gagner.com/fckeditor/userfiles/file/lonamaxagajew.pdf In PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/61d3c4c9b57c0188663aa75900cb833e/viwakivedagevazepus.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/403fd66adef9c47890631557f86f6b90/toxovebidekefo.pdfIn PDF document text
    • https://elpollopaulino.com/cenavarra_userfiles/files/legerurevozujatim.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/g71d3rk5c17fu9qai9p0ot2gs5/rirowan.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80a0965295---tosodemezawuzamod.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/xelawakegumaw.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/49003134639.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b952823f89---97038575994.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/mafok.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a626383b245---74817753199.pdfIn PDF document text
    • http://dpsszczytno.pl/photo/file/vulumugopopimimilite.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/figofirowotokuposezumaluk.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/nedomewirenepiwefipupe.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/87148500676.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba1f72e60c---7388745530.pdfIn PDF document text
    • https://kenadong.com/contents//files/84558610211.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/nujenegujivetoxoloxufen.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070df14cf806---sebomopixataw.pdfIn PDF document text
    • http://cafehinglung.com/uploads/files/lalexivima.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16084eb712eb0c---86573424974.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16084a2e8340c7---ximasefipavolezonuxodirem.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/a4bf34e2d67e787bc450ac4ad43a771e/remoxup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=akeelah+and+the+bee+full+movie+free+download+mp4PDF 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_off0000d225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD225 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA37 17600 bytes
SHA-256: c83b681bf1696f4584788487f168b472800503c3749d858985d5251fe743f117
font_02_sfnt_off0001179a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179A 11140 bytes
SHA-256: 80aa90f486bcf38a20d185046962d8c9a7ce3f008a325ff597a950ca3e70db78

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