Malicious PDF — malware analysis report

Static analysis result for SHA-256 da60704b833e8a75…

MALICIOUS

PDF

111.6 KB Created: 2021-08-07 23:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1798a8ef394c62b489bc2bc3e71f5d60 SHA-1: c8b04b1834a9d343e9e6b424976b063b8e6650cd SHA-256: da60704b833e8a7558f03a9dde0652bb9b04cec393451b5d94b4071038b92102
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16090bab228e6b---vosovudukopebemovirisixig.pdf In PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b66ee11572a---90106835343.pdfIn PDF document text
    • https://forumhrdbekasi.com/webroot/userfiles/files/zofavaraxodumitas.pdfIn PDF document text
    • http://terralindahigh1981.com/clients/866868/File/94649163138.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/16964054636.pdfIn PDF document text
    • http://somersetcountybar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rurunozinogegaxuzeberuni.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/jslofa9sjagdev90a33ra2b3b7/limuditenuderikametel.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f082425943d---wimatefimofe.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/gijinevapananopivurogiw.pdfIn PDF document text
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/kemetopuwi.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/45375088251.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095384ab91f6---44531427245.pdfIn PDF document text
    • http://misr-consult.com/userfiles/file/bifanipatodobuvo.pdfIn PDF document text
    • http://jonkmp.nl/img/cms/file/vawaperuwujarizu.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/rhbubbl037lv73s4bnp3g4cm8i/96921587649.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//gomazalijap.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/rebomuwinamis.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/34886568965.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d435c13a6d---zigurabuweze.pdfIn PDF document text
    • http://bclgrouptt.com/userfiles/file/55784895885.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/k83qss7co219e650tm0nnnj8i9/78272566503.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fe5a3bd52---87832126168.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/98956652099.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f0171f012---foker.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=what+is+the+job+outlook+of+a+mechanical+engineerPDF 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_off00014efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16710 17088 bytes
SHA-256: 81507282dce4f1a8145b18ad201c4df545db983c41f298322e62f9524b162afa
font_02_sfnt_off000193d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193D4 11236 bytes
SHA-256: 58a963ccfb31bd7ba7efb6350063f80098e01161075e3329ce7cbe54d064d05a