Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b14a7db61191785…

MALICIOUS

PDF

86.8 KB Created: 2021-09-01 10:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e3e0ef5f191894e9b9238b2d451dde68 SHA-1: 0e63140ec214b81ae57c537bdfa84c25efda2022 SHA-256: 0b14a7db61191785ac8bf855fa51f859971963d17270d8ebeec9b623a04fcd1a
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of multiple external URIs and link farm heuristics indicates a deliberate attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://catamma.ru/uplcv?utm_term=tom+and+jerry+car+race+full+movie+in+english PDF link annotation
    • https://swalaya.in/userfiles/file/77213274140.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725dbaa4726---64409274712.pdfIn PDF document text
    • http://vanxuantravel.com/upload/files/nosoraxowanukuvuz.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/gorunusexowavitugopugi.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/2147898916.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/bojofamuwomore.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/5927151972.pdfIn PDF document text
    • https://soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images/files/lonixekejateburiboxa.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16073b9a62aa69---4428845164.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16087b837cbaa7---58921780213.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a50604083a0---mijukoxoremukiko.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/d2e76a7cff5a0f3ec8285313608d5ae0/94361980096.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/zopamawu.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9eea760f1---54103943283.pdfIn PDF document text
    • https://31app.com/userfiles/file/govizumiximarevizexuril.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/51975240653.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles//files/tovar.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/71127372763.pdfIn PDF document text
    • http://mobiliteit.nu/files/wikufopixalasap.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/cccf223f95b583be3ba5028826c28dce/dadofa.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca671534c8---ferematisu.pdfIn PDF document text
    • http://franklinbristerharveyfamily.com/clients/a/a8/a8910385c57dfddac3c6311e2bd1422e/File/sefasesovaniponafovu.pdfIn PDF document text
    • http://barcelonahotel.vn/UpLoadFile/file/lowinoluvuzamipabaxorerop.pdfIn PDF document text
    • 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_off0000e99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99C 18644 bytes
SHA-256: 637cdada8543beb36ee3d4812b28dc15f064d6189de2b37cffb335b0c9966cfb
font_01_sfnt_off00011a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6D 11196 bytes
SHA-256: e0c1d9df37b055c56ed77799a320f9e649545137224746f0c0794bde916e595d
font_02_sfnt_off00013438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13438 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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