Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32d2e9e1782c6a6…

MALICIOUS

PDF

99.1 KB Created: 2021-09-08 11:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bbf91ec557b582c95ed0cf6215a9bada SHA-1: feee6fcc8a05748451db1cc485625d42b9710855 SHA-256: b32d2e9e1782c6a671ff38a06569ed77e44e5a358ddb78d6ad8bf80d70af7381
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to other PDF files hosted on various domains, some of which appear to be compromised or disposable. The primary purpose seems to be directing users to malicious content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

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://greatnice.club/updatefiles/file/zikemedemevasi.pdf In PDF document text
    • http://brukbet.com/user_images/file/menasazaxubudikuxaf.pdfIn PDF document text
    • http://kahsport.cz/userfiles/file/14808569264.pdfIn PDF document text
    • https://medtek.vn/storage/file/96706277067.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/firepowuviloraseviloxuse.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/tubitoxa.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/088885dc41e3c1e8003bbe149614056f/41974907055.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/21623079941.pdfIn PDF document text
    • http://rungrawin-itt.com/userfiles/files/mepubudujasu.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/91fpaiklsmvqn9nhf1huvkl9pi/50791885322.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/281514202185.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/13260321682.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607608fe50ea2---wawelifomurobunaxapo.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074799bd4aa8---bufoxuvegiponod.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/donuse.pdfIn PDF document text
    • https://voyageaventurenepal.com/upload/files/51986618375.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/rafilijaj.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/xanaxifipu.pdfIn PDF document text
    • http://htcable.cn/d/files/zotemexijogigafemesu.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/sudusuwokut.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16082cab393ef5---98688458394.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a516f32ba69---74808545032.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160e12157a92ad---21337940776.pdfIn PDF document text
    • https://tongdaidoanhnghiep.com/app/webroot/upload/files/71313586766.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7d9e32ddd---6107470989.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161054ca99feaa---juzotifasorogafut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=denuclearization+of+north+korea+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_off00011abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABC 10800 bytes
SHA-256: ae46e5c76029eabc0e279c962c51fe422167fe854d8d6507e9fd2787e16029a5
font_01_sfnt_off0001339a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1339A 19760 bytes
SHA-256: 317d9933e2421dbca44f1ce978198c2173f91d6ea82098759f3ed842dc18859f
font_02_sfnt_off0001664f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1664F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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