Malicious PDF — malware analysis report

Static analysis result for SHA-256 1720015d1a68aca6…

MALICIOUS

PDF

79.4 KB Created: 2021-09-02 17:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7a97a0b2948a52b8f41202ca1f89b678 SHA-1: 66492365067cd5393ed893153274c34c6bda0fb2 SHA-256: 1720015d1a68aca677e17cb3ec6a95d9ce9b87a338774ec69f1dcc004926f16c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://botosani.ro/img/uploads/file/81403262788.pdf In PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/bccbfba125a49473c13b25631e43ffac/27281136832.pdfIn PDF document text
    • https://pasarantogeldua.com/contents//files/22226014100.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7ebba0991---91599901652.pdfIn PDF document text
    • https://www.cosanuesa.com/componentes/editor/ckfinder/userfiles/files/samexowavo.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021082419128_639146702.pdfIn PDF document text
    • https://pindimana.in/uploads/file/58834641480.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1611d234da4011---47314196436.pdfIn PDF document text
    • http://asr-net.ru/uploads/files/11899533655.pdfIn PDF document text
    • https://er-cardiff.com/eurostyl/photos/file/galotibomalozoxew.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/vasamakugaz.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108dc99976c4---wudevoxejegukan.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608663dbeb557---balutadivejuje.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/38334342543.pdfIn PDF document text
    • http://grupposcorcia.it/userfiles/files/lomazedizawusomexe.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f49c7998141---49792943571.pdfIn PDF document text
    • https://actorconseil.com/files/file/nikipomigeg.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/wevem.pdfIn PDF document text
    • https://nguoixunghekiev.vn/userfiles/file/gobevap.pdfIn PDF document text
    • http://agavietnam.com/img/files/3626293010.pdfIn PDF document text
    • http://cluboutletmoto.net/campannas/file/pudaxivezolo.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e49bc9aa8ee---kododexabisufiridubamawi.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16108118ab9bfd---52743554848.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/wowalisinezo.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074015c901e0---5664862844.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=manual+de+identidad+corporativa+en+inglesPDF 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_off0000d478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD478 16928 bytes
SHA-256: 05ecd06b3b818f6d865ed911c3bb6d831f6dbd8f650f41654ad4ba73a68cc9d1
font_01_sfnt_off0000fec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC1 10848 bytes
SHA-256: bb9dcdf96581ad81bd4f9f83230fabbbf4e5db30179e8d9521c5fe3695e6cec0
font_02_sfnt_off000117af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1