Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbfe0741edcb5908…

MALICIOUS

PDF

70.3 KB Created: 2021-09-24 10:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ee1e36e833baccc4ce4c0cf9ced1389c SHA-1: c56b6a86f8131b38900d1b6157578cd080fd0c63 SHA-256: cbfe0741edcb59083f755ac1c63cd05f51233f84ce04a49da17f5fd1ca5a4824
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malicious content via the provided links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://le-lemniscus-incandescent.fr/ckeditor/upload/files/33571408064.pdf In PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/1916491625.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/10918017404.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/dekasixikejegejuvoxu.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/lurarog.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/jumixuguwazexefinurofized.pdfIn PDF document text
    • http://pololanna.com/user_img/files/vetotizovubodupuwezusovuz.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/q9a98rpmlfkupi04i2u4rd8h4b/55412410158.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/pisubafajesuseduduf.pdfIn PDF document text
    • http://tongshengchem.com/ckfinder/userfiles/files/nizukagufufasonaxapogagaw.pdfIn PDF document text
    • http://fueandhair.com/userfiles/files/zulezep.pdfIn PDF document text
    • http://getdol.com/page_data/file/kewuseja.pdfIn PDF document text
    • http://gimnazjum-krasiczyn.pl/img/userfiles/file/32085407255.pdfIn PDF document text
    • http://hb-hospital.com/file_upload/fck_upfile/file/regobujufoberegawedi.pdfIn PDF document text
    • https://kirbas.com/img/uploaded/file/99345896592.pdfIn PDF document text
    • http://theponghop.com/upload/files/gutef.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/wupudelogomajotanu.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/fadugedanewu.pdfIn PDF document text
    • https://rintrans.com/files/11688774653.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/23931943409.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/xazopawasiwerinukopef.pdfIn PDF document text
    • https://mimpishio1bet.net/contents/files/50822524831.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16140be188b0e5---92046713331.pdfIn PDF document text
    • http://wx-bm.cn/upload/ckimg/files/202109240818493943.pdfIn PDF document text
    • http://acelybio.com/upload/files/sesupi.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/6335926920.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/9be7f018ffae9af27d921b9713e1ce0e/vawegedaki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=evpad+3+not+workingPDF 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_off0000b4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4CC 10620 bytes
SHA-256: 9ba64967ca200c2d92075084e7b2d1b733c129c8d85b3780c86eadd344abddb0
font_01_sfnt_off0000cd02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD02 15260 bytes
SHA-256: 50480c921694ebcf0a1be51cc94207c5faaa68cabc165f39f26a55c76adb630b
font_02_sfnt_off0000f3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1