Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c6d1867b9c41e2d…

MALICIOUS

PDF

78.8 KB Created: 2021-09-19 13:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 813524803f42d476b9c4a8fbe39b647b SHA-1: 051053ff879af39eab1a52040865a77c7398c94e SHA-256: 5c6d1867b9c41e2dcabb9d3d88cf30c8e8f8dab78d8d8162595a987494174dd8
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document functions as a link farm, containing numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to lure users to malicious content. The primary attack pattern involves directing users to external, potentially compromised resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://firmabudowlanawalczak.pl/web/uploads/files/gijarekagevibesufupe.pdf In PDF document text
    • http://imdmotors.com/uploadfile/file/2021091906453898.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613485e563c15---bilaromijimozimu.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/43041340119.pdfIn PDF document text
    • https://khachsan295doson.vn/namthuan/images/news/files/45940468017.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/bee9e8f5ea5438cb9b6de733c09e4293/datizuvinogarerotaxekiz.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16146aab4cd4c7---75971436585.pdfIn PDF document text
    • http://mtkshop.com/images/uploads/file/jitelonobaxuluzalexumo.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/a1385b670ac26ce210014ab7f7cb3268/kikuwokebezekedetofev.pdfIn PDF document text
    • http://cabanagarden.hu/editor_up/53170111215.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8c3ce8d5b---xaxigukajul.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613de6717e4d2---76596812306.pdfIn PDF document text
    • http://nawoo.net/userData/board/file/72631688509.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1630456334.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/43156992585.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/xofutamozomatevuw.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/51802565090.pdfIn PDF document text
    • http://bk-plus.at/userfiles/files/gudobipijupuwad.pdfIn PDF document text
    • http://fivelscope.net/fckimages/pejiluwulozaput.pdfIn PDF document text
    • http://xn--h1acbpobggs.xn--p1ai/data/files/zamopavufuzunituf.pdfIn PDF document text
    • http://erodiertechnik-wenzel.de/userfiles/file/bexekiselojuve.pdfIn PDF document text
    • https://www.afoa.org.ar/backend/ckfinder/userfiles/files/51608126516.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=balance+headphones+androidPDF 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_off0000cf59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF59 17896 bytes
SHA-256: 8745048f283d1707fbfe51a1ef3b27063d173c09465cfa0048ea1286a870e6d4
font_01_sfnt_off0000fdda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F1 10564 bytes
SHA-256: c061371d412d6191e82d481ed5de615a5cc88d02b8bed233fb35daab6bc6083d

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