Malicious PDF — malware analysis report

Static analysis result for SHA-256 580372b260267750…

MALICIOUS

PDF

91.0 KB Created: 2021-09-16 05:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a93c2f52c869452799914b57f71745e4 SHA-1: ae8821e96301b910744039079fa289b2e4edca4b SHA-256: 580372b2602677501146a56524868d96392225671e66b03856e922b176a4989d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://coretry.ru/uplcv?utm_term=onlinemoviewatchs+new+website PDF link annotation
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2ce0ea95e---budisipako.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/8614274556.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/saxolejosuvefigudi.pdfIn PDF document text
    • https://isigakizima.net/img/tmp/file/sabopo.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/161425846cfc2b---fifabuzozove.pdfIn PDF document text
    • http://tanabuauto.com/js/upload/files/wegutasafanodiwato.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/nopove.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/87573590441.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/wumemidupo.pdfIn PDF document text
    • http://www.icf-plant.com/files/file/pojovitifano.pdfIn PDF document text
    • https://postele-z-masivu.sk/ckfinder/userfiles/files/13581952694.pdfIn PDF document text
    • http://hkwwta.org/userfiles/66158218745.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f09b893588---xilab.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/xorulabomolepupusude.pdfIn PDF document text
    • https://sonerofset.com/userfiles/file/43048516356.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/412dio8uoosu76obas5cdub811/bigupafatoporajo.pdfIn PDF document text
    • http://trunghungplastic.com/luutru/files/92693113091.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/fozunuwuke.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/vebaxi.pdfIn PDF document text
    • http://majedalkarkhi.com/pics/file/69278299249.pdfIn PDF document text
    • https://eric-parnes.shortex.com/ckfinder/userfiles/files/tetimuminosixuwu.pdfIn PDF document text
    • http://dyccpharma.com/upload/files/62700270534.pdfIn PDF document text
    • http://generoussecurity.com/uploads/63547871598.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/sinuxevobodaxisomi.pdfIn PDF document text
    • http://www.culturehousesun.org/photos/file/66639728367.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/dunubobigadisojijodawo.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_off0000ff48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF48 10712 bytes
SHA-256: 0b4511b129331556d6c3dfeb7c119b08e5ece2b9b65020c681a2c85603fd9c09
font_01_sfnt_off000117c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C2 18044 bytes
SHA-256: 9b6f2b437f86e1974ad71b8705b3d212c70fa3e518b48fafe15b0f7b6b43b93a
font_02_sfnt_off0001460b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1460B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1