Malicious PDF — malware analysis report

Static analysis result for SHA-256 625f84c6f7967089…

MALICIOUS

PDF

71.4 KB Created: 2021-09-28 14:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 82faf0bab540b453d75db156ef1cdec3 SHA-1: 028488656fd802ee2f91e3dd8426524daf28e202 SHA-256: 625f84c6f796708971331eb3fba84d2400df735b412f7e68223dc5f6b0a113ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the nature of the embedded URLs and the PDF structure suggest it's designed to exploit user interaction to visit malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://crewmak.ru/uplcv?utm_term=minecraft+latest+release+android PDF link annotation
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613460b031b06---tibewa.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/jagaxedotepolaj.pdfIn PDF document text
    • http://bayanairag.com/uploads/userfiles/files/bovozepupe.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/37077806869.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/161413aad2442f---90255648906.pdfIn PDF document text
    • https://floridagreatescape.com/media/file/mopanoforivugosiza.pdfIn PDF document text
    • https://healthtecindia.com/userfiles/file/nurinerozojat.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/gusizusidurasonikiwese.pdfIn PDF document text
    • https://rdw-wolf.de/backend/ckfinder/userfiles/files/zufurilopi.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/risuselasepakikavipuk.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/rufizisaxuzavadavijepa.pdfIn PDF document text
    • http://milkexim.ru/imgeditor/file/7358629881.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/xefezakapavawijivoziwixom.pdfIn PDF document text
    • https://chuyennhakienvangvn.net/upload/files/8138806768.pdfIn PDF document text
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/vexalavulinegirozudebozup.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1615164ea9deb1---jadixulutetefenafagivul.pdfIn PDF document text
    • https://zhongzing.com/uploads/files/202109080205114795.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/mejekibus.pdfIn PDF document text
    • https://floridagreatescape.com/media/file/33610232092.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/gutagos.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/19207152390.pdfIn PDF document text
    • https://skywaynepal.com/userfiles/file/60072893362.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/04886c10b3f662100c4420589c9edec7/34222542175.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/39247986097.pdfIn PDF document text
    • https://istanajp.com/contents/files/63402654692.pdfIn PDF document text
    • https://cakamuzejs.riga.lv/ckfinder/userfiles/files/manidurekawijosapojedav.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_off0000b4d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE7 10460 bytes
SHA-256: 11d5aba855ea2887c54011b19f22d3db4d27bf301228c01f9a1458f6ef74a4af
font_02_sfnt_off0000e4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C1 16216 bytes
SHA-256: a8c727b3145c59b96a2544c28780f1949b568f99a18942e327d77163dd6de8ff

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