Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a4bf843de36393…

MALICIOUS

PDF

74.5 KB Created: 2021-09-27 11:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 08af1d7ca2c3ef8efa27a801a87a4c02 SHA-1: fc6bce737b744483aeb6cb6cf36e4d14fc236aeb SHA-256: 76a4bf843de36393672c7c5e9f62efbb6c2380273bc22f3634afa29806d980fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The presence of ClamAV detection and ML classification as malicious further supports this. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://philabc.ru/uplcv?utm_term=anna+tsing+mushroom+at+the+end+of+the+world+pdf PDF link annotation
    • http://dubilex.com/userfiles/files/gomotetefit.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/jitekazoxaxunave.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/texiwajonuw.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/suvijeguz.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/72964886256.pdfIn PDF document text
    • https://glaze-metalart.com/upload/files/sifubefosozigij.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/uiuqovldca593ni28cb48lllp7/56659335210.pdfIn PDF document text
    • https://bliznacite.com/files/dekelasogifim.pdfIn PDF document text
    • http://stfurnimart.com/file_media/file_image/file/75737140850.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8337e2767---81218501198.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210925212037_1399904542.pdfIn PDF document text
    • https://clinicscrm.com/img/files/mobejaseg.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/44555506580.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/jizaxuroribari.pdfIn PDF document text
    • http://www.icareonline.net.au/ckfinder/icare/files/85764824702.pdfIn PDF document text
    • http://sarafis.pl/img/userfiles/file/xelifofarubev.pdfIn PDF document text
    • http://xn--c1ajalgzu0a.xn--p1ai/userfiles/file/baviwesupemifosawupolak.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614559895275d---86284411725.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/voxeju.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1614ecf5779fbd---92271489621.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613f14ecc3f93---tutuv.pdfIn PDF document text
    • http://mamnonkitty.com/webroot/img/posts/files/webotozujumukani.pdfIn PDF document text
    • http://pjteam.hu/uploads/75287135690.pdfIn PDF document text
    • https://majubesar.org/contents/files/41466887147.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_off0000bbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF5 18184 bytes
SHA-256: 36364a54724bdbfca63d9dd9a1dc06bc47120a6cfb4105bdb7774bee54707288
font_01_sfnt_off0000ea85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001029c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029C 11112 bytes
SHA-256: 66b0c883e19af089af801161183ddec6f9822a2108f4dec26335bf41235531dd

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