Malicious PDF — malware analysis report

Static analysis result for SHA-256 10707ed7444c4fe7…

MALICIOUS

PDF

90.4 KB Created: 2021-07-02 02:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 553a0121402e8da07e7f2debd2f2b51b SHA-1: 4675a7f939d070772e7beea44139f7db54e4bcfc SHA-256: 10707ed7444c4fe7f7e8a4e106073326bdc638d55b408c8adc1e5bc3e8738498
164 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports the malicious intent of luring users to download files. The ClamAV detection and ML classifier strongly indicate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://archism.ru/uplcv?utm_term=pok%C3%A9mon+xd+gale+of+darkness+download PDF link annotation
    • http://thankschicken.com/uploads/files/9930559344.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/955cc612722b2c7d7f1db8ce7f54aae9/63444757839.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16079d045ed642---32946485994.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec1a1c12e7---2237974266.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/336388c9e53e100bf8e7a3eadc7185a3/92193836091.pdfIn PDF document text
    • https://digireg.org/upload/visuvozudujevifilado.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160c2cc309b4ad---93249394853.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3faad5d7fd---jowupumisovenem.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/356da64b7432e90690138419ef8ee7ab/fukudate.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983d9fcc1d2---rowijodutigoxigi.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/12b7f9a9fa5f2dc93ae27140769feb53/90142463345.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/h3snnmgi9se5vrlbtq4hnemhg0/9035474207.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/2n3c5723o21og6ds4rit72qdi4/xolidopawarivugugotuwed.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608662902f769---35420961476.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/631e0a5fd1061f7f6e01f022e5fd2146/19150560798.pdfIn PDF document text
    • http://kingnature.ru/files/files/58633247116.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/94888899606.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160877d7e3e095---90397874018.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b50b0bb2699---fuveduvafidoxe.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ade2e046d18---motugazorabame.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/63fc4981574c1dfc7d707b196678f1c0/27255213707.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/81172701819.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094de521e7da---puvejanitojuxos.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ece0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE0 3712 bytes
SHA-256: edca4e845ee33128d247cd8d75a4e4af8ce27554e034fb59fffae4a85170c8c7
font_01_sfnt_off0000fbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D1 10944 bytes
SHA-256: 2a17b96b9059d1dd858c04da531e1e9ce5b1e27ba257d1d37e4349d03af8d538
font_03_sfnt_off00012cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CBE 17612 bytes
SHA-256: 3de01f7dbe2f179fd9ef53571463f70c68c7fb2d9accebca43f0ab0fbd4cee2f

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