Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf512b6c3cd8bce…

MALICIOUS

PDF

91.8 KB Created: 2021-07-25 12:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0913b2206d961148adcf7185902b8d0a SHA-1: 7a999654d19b26a242143945308628177d377bcc SHA-256: abf512b6c3cd8bce12e33e5db24ce59af9d3bc81a41ccbd9969e26ce2cc4173f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content. The presence of embedded JavaScript, though not directly analyzed for specific actions, is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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://kondicionery-domodedovo.ru/upload_picture/file/66114704916.pdf In PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/99e1307c1f72e4e1dbb4a74f0c640bf3/15512860773.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/e9g8df0m8v4r7o2amhth7ffeh3/20683203876.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700005d13cb---13074108555.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/wukusaxibokaragutujav.pdfIn PDF document text
    • http://flatadministration.com/uploades/fckeditorfile/48187830347.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/wizesabajuzit.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/0cb818e34357450659a5057c96757247/ralipadesajibiriva.pdfIn PDF document text
    • http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/62408243822.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881bc93cb07---sudidiworisimevuduf.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdae24eb2c---84136253621.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/furavesawili.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160992dae12893---kutibuwuwowile.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2f9d842bd---3043645783.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16087a6540a7a8---21203088741.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/qtvri8vjk288rqhfmtvds29hpv/lesuxolokixarerer.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c5386c0c7---55772960173.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/62163261590.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160716608b97db---liworofamaginep.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16094953490b56---55577695692.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/5f67f536720ff3279dba6d13ab0c0ea0/bigijuwa.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee13b4d7ee---javepilidavesebuni.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/b61a1805200d4d786901631934b42575/31139000471.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/leporelomaviwabotebujovi.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160892395a2a68---kuzejilefowip.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/31501397353.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=manuale+di+scultura+su+legno+pdfPDF 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_off00010380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10380 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B97 10888 bytes
SHA-256: 4dcc9efcb6677a748ca483058fa348719b5206cdd5f8bafcec94a3a1b9708fe2
font_02_sfnt_off000134a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A3 17788 bytes
SHA-256: e70af01fff3be0c72ca406a099cda24a5d390603c6ba1f65902aa69007456d50

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