Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f65062ddadd8bbb…

MALICIOUS

PDF

75.5 KB Created: 2021-07-24 13:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d69125623f05bbab4ce54cebc6ea6e05 SHA-1: f30b58934734283134319aa569cd139666828a9a SHA-256: 7f65062ddadd8bbb6906aa9152691ed12458c56ed6628de4a3d69bcd3db0f2bb
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. These URLs are likely intended to lure users into clicking them, potentially leading to further malicious content or downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac785216dfe---gomajizukalidu.pdf In PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160894f65b8710---25851816149.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/36952405225.pdfIn PDF document text
    • https://naoshima-habitant.com/20556155560.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfb22829e5---70752783587.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/kkc97h3eoc2t4csi1qg9pjnv43/jegosizu.pdfIn PDF document text
    • https://ikansambel.com/contents//files/vebaxojubewazu.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb79edf4c0---walup.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/topelano.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/95822090819.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents//files/norebasamajiduk.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/935284ae0206b57460da1b701743b3d3/wuwejefivirakopes.pdfIn PDF document text
    • https://isosklo.cz./uploads/74831823606.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210724_68EFE640A87759F3.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fc90dfba6---41018226371.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cae66c992f4---sesoxodilixibo.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/rizerirewegi.pdfIn PDF document text
    • http://hkacca.com/userfiles/negasemigumatubad.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/j0ks6mqekj4hfhhcmkgfce6vs7/nibelovu.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/taloteluvifowubogum.pdfIn PDF document text
    • http://bennyhigh73.com/clients/3/33/33ce00c6a031cf3b17a3dcf69aaa7594/File/43610617541.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160943c0d73070---neveruwuxodebodesagor.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/1d3343be589007a723d9a219402ed484/98711007247.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/284c0defb8423cc7995db7842474cdb3/pumititiluxasosuxodapom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=palme+yay%C4%B1nlar%C4%B1+yks+%E2%80%93+tyt+biyoloji+soru+bankas%C4%B1+a+pdf+indirPDF 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_off0000bff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF4 17584 bytes
SHA-256: 3fbce54701ac3476a5fca20d9e5317c79fbedf5aa335aa4237475b962f1804a6
font_01_sfnt_off0000eadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADD 11312 bytes
SHA-256: cabafdadf90aded8c3b9c8a7cf0455450c657781728a097a16ad294accaa09d2
font_02_sfnt_off0001052c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1