Malicious PDF — malware analysis report

Static analysis result for SHA-256 9beb6a0a5bbd2e21…

MALICIOUS

PDF

72.1 KB Created: 2021-07-02 02:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 229847c4332669d45166965ab21f3968 SHA-1: 988ed82777aa239b7560173b15ea0bd00d4a2d78 SHA-256: 9beb6a0a5bbd2e21cf7e220dccce293572f3a7bec13e6ade2db67775e3ef84ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised websites. These sites likely host further malicious content or phishing lures, indicating a multi-stage attack. The presence of multiple compromised CMS upload links suggests an attempt to distribute malicious files through seemingly legitimate but compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://rosesrealtyhomes.com/userfiles/files/dodigumuduzol.pdf In PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/83e9bb3629407d95f728742376331b4e/fizisifizumuxorigok.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/jazarurevapixazuzuxuxidi.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160813c97341bb---weruvewef.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/10930128461.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b14e60d06c3---jematorutedaruvene.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/86468671978.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/57440660697.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/rawetevak.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/tiwabepu.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4af72ebb3---94146672108.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/ziposibivavanevu.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/0t9dfd4ra333gj223n7qugof8r/zavozug.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607921018f3a1---nupuv.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/95692751967.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/50098029358.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/63154056757.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/bikugoriralo.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1624932967.pdfIn PDF document text
    • http://inezorviskids.com/clients/37546/File/43088951722.pdfIn PDF document text
    • http://bkbflooringusa.com/userfile/abbey/file/bepimebotiwutefaxefi.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/14444645720.pdfIn PDF document text
    • http://pneusmarene.it/images/file/64097091247.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=integrated+math+2+cpm+answersPDF 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_off0000b949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB949 16040 bytes
SHA-256: 7383918184489effcca3db6130e83662e2f8aa2994db6578250d4a935cdd080c
font_01_sfnt_off0000e27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA91 10860 bytes
SHA-256: a265ed788f367b2bf47a1d8b7b082971e40ac0dba17f5f5a08feb5ca53695298

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