Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c07de5f3b318d1e…

MALICIOUS

PDF

77.7 KB Created: 2021-09-01 01:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 366b529066ccfd10d2d603d2ea4b51bf SHA-1: c850d76175c2108a867acde7551497af25c7316b SHA-256: 2c07de5f3b318d1eab904bd0597c743c3eda250f118a17e3a125d962d491708f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URI links and link farm patterns indicates a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://pixomot.ru/uplcv?utm_term=now+you+see+the+light+stand+up+for+your+right PDF link annotation
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/imre2f4m3je8si7sikrv9qsui1/80652944364.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086159bc0128---3444705087.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754f111dd5a---fopuzazozobatax.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/4874076740.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/vuteguwobetadewivinudo.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/4267be4261346ccc8be1de79f3e53df9/mederapazoworejafofiwuwep.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-7-19/20210719145231629652.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210830_193735.pdfIn PDF document text
    • https://tantecoccole016.it/file/kasuzozanudegebag.pdfIn PDF document text
    • https://webmenuplus.com/images/file/ragora.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/belidemesedituwore.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/245eb0f8289d15a17db18ad725c7e770/jevutipekejoleke.pdfIn PDF document text
    • https://www.frontiermea.com/sites/all/libraries/ckfinder/userfiles/files/31055350913.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/jiwavuxigomufuliwe.pdfIn PDF document text
    • http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/76587317992.pdfIn PDF document text
    • http://dienmaythanglong.org/uploads/files/jugirunanibozetuzebo.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/21869934803.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc35e4ec374---32142948324.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/xaporegojekutolemaxoxi.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/661f5641de2da2092b00b547e4ed3004/zopudalulovapakun.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d54eb1ef7a---70540033005.pdfIn PDF document text
    • http://bi-acaovo.com/upload/files/56584045785.pdfIn PDF document text
    • http://chongros.com/userData/board/file/relusokirelebojep.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_off0000cb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE391 11056 bytes
SHA-256: 129b978205e1baf0bcdbc853341e7b259f58a837e12c71ab645f8832dea72764
font_02_sfnt_off0000fd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 16932 bytes
SHA-256: f9c77f87ab1e8712df278d6d140c7ab9e70fb60c3a0a9865630fafda23a66c46