Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c08c3c7fd1c891f…

MALICIOUS

PDF

85.3 KB Created: 2021-06-27 11:35:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 10d2b9470a5bd1a21f8267d07779afa3 SHA-1: 90384bfec6faba46eca325cf2c8de8773f1329a5 SHA-256: 2c08c3c7fd1c891f4f1cffbff51012e409272eee9ee6434cf05bd5cfddba1ffd
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware via these compromised URLs. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/999042891b2830b92d6169017e85c01d/gonunirosurijafesap.pdf In PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16077645d0a5ef---46174422735.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16097637f6bd62---92674537718.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f0efbd82f---velimiwife.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/sukepuxajojotabovuwi.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/dupefimaxajoxetipufupon.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a748e03d7bf---titomotisopo.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/zudoziwinutexujig.pdfIn PDF document text
    • http://vodnik48.ru/content/file/wawez.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1624505300.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/ba1712a1f154fef5698e7899a591c3eb/97718133404.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d85abdee86---nebisip.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/irtf8pm1g95edduoj0g0vp7aq7/54665580774.pdfIn PDF document text
    • https://airshow-bg.com/file/dalup.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/48b74177bf63d785d8ebdf400b7f6cfc/33817086073.pdfIn PDF document text
    • https://srmhospitalities.com/images/bulk_images/files/wugoritis.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c3f1c19c74c---tolexowunaxun.pdfIn PDF document text
    • http://kuzfarm.ru/images/file/kawuxuba.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/webalupibogabepoja.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/h4egnefufagiqurp7r0jnopfu6/12008867809.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/6978628403.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=windows+print+pdf+from+command+linePDF 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_off0000e566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE566 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7D 10860 bytes
SHA-256: 39e387c317fd70afdd992161b1d94e5ed0d29ef712a9942f834af77e44268c59
font_02_sfnt_off0001169d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169D 18660 bytes
SHA-256: 929f2219b3b2c51ec57235db7f6f343c2e548dacc8ef7f57486d5e97b1fe1f25

Open this report in the interactive analyzer, or submit your own file for analysis.