Malicious PDF — malware analysis report

Static analysis result for SHA-256 9686b72d54ea2084…

MALICIOUS

PDF

76.6 KB Created: 2021-09-17 03:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 215231846d9591f9da214921bc15ecd1 SHA-1: 548231969c49d59d83b9608fafcc815f37e93bb2 SHA-256: 9686b72d54ea20846b51341d769bc3d92ffd50a8e5c964fc60d771bc52d4f998
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade initial security scans. Numerous URLs were extracted, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm used for distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://velkoobchod-man.eu/ckfinder/userfiles/files/86381416412.pdf In PDF document text
    • https://mimpisiluman.com/contents/files/livitedogikevixakaloteki.pdfIn PDF document text
    • http://cerrutistudio.eu/userfiles/files/21455098192.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/suxabexul.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-09-04/210904095026231539v3v7e8b8e54t.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/19766710897.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613c29dd88e11---62737516521.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/32641358570.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/38606179148.pdfIn PDF document text
    • http://fruitvita.com/files/files/tivupew.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/26540587973.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/pikiteropubijefepuni.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/tvlf43u9pcve3sribhs93f0f58/bidipazikum.pdfIn PDF document text
    • http://eskuvotoszkanaban.hu/editor_up/begokufikesexusu.pdfIn PDF document text
    • http://studio5r.com/userfiles/files/69407359636.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/9kput5776h3an5j6smvi4hs2v3/wawem.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/63504413285.pdfIn PDF document text
    • https://unosms.us/userfiles/file/63211014860.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/161423c33d61c6---42587416257.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/manaxumijenafoxipomi.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/kolufovuzekesexi.pdfIn PDF document text
    • http://redactron.com/userfiles/file/zofozegusulited.pdfIn PDF document text
    • http://templeton.sk/userfiles/file/zufuwikabugekugov.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/sinadavekewakari.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+extract+file+in+zarchiverPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D0 10572 bytes
SHA-256: 80f5e6e0ea97146621e4149e852d731e1cd42b9ac3b6a9fa44c4163799dec243
font_01_sfnt_off0000c9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E0 14864 bytes
SHA-256: a6810e6f920adaafe570f4ff6add5236afad4a18ca179a0fa8df31929368bc3f
font_02_sfnt_off0000ef90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000107a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A1 18176 bytes
SHA-256: f9d6ae7f05bcfead92d517be1c8446aebaab40e7cc6c51f9d533763f57a5df6b

Open this report in the interactive analyzer, or submit your own file for analysis.