Malicious PDF — malware analysis report

Static analysis result for SHA-256 74edee7fbe627895…

MALICIOUS

PDF

84.0 KB Created: 2021-07-21 16:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d982f8f0f430a34e49d842b96595d0b1 SHA-1: aa4e4b58b1d39b0beb6028c31b8d5321eed4171b SHA-256: 74edee7fbe627895a97f2f51ffab64fad791407c8e018c2751bf0b9190c19c5e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many of which point to compromised websites or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://universalthailand.com/images/uploads/ckfinder/files/midaxizapaxamotefinenose.pdf In PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c95809d2e2c---rupupejajimunevaxuxala.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/325781ee61bc3b233efa585ba1e07106/wufofelol.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/xarofaxome.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/wuwesetexof.pdfIn PDF document text
    • http://rspon.pl/images/wyswig_images/file/nokid.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/40fgelo6fju4pmsjl0a9i0iq7g/fuzagilesobujur.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/41067064025.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fe5213e90---31162364773.pdfIn PDF document text
    • http://gagutp.com/sa_upload/userfiles/file/20210601204648.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/tevidujosapakiwava.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/33474437625.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f09e71d67f---ranufivomo.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/57ouapiqsngb7i5o3rn7se1ur2/12510896198.pdfIn PDF document text
    • http://carszana.com/image/upload/File/vipelutuloxosexofasazitik.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/97873932235.pdfIn PDF document text
    • http://clubcrudupsonoma.com/clients/1/14/14cf715f5cd05ddba197ceaa5938d7d5/File/79789269662.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/ziwevijigozezepakuvi.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d4497673c---gomiwafarubek.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/10357c1edbf3c8b3df12420e75dbe18b/44203038707.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/80731554312.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/11471197174.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160e168bc4bc30---mimanimebijepamonat.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/070b2618292c222b497ac7a9c4e33ab8/50979483900.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=times+square+new+yorkPDF 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_off0000e2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FD 10628 bytes
SHA-256: b9b656a3316e0e553fe9e11645feba3718fe3ad4f918493055c2444aad769dfb
font_01_sfnt_off0000fb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5D 18020 bytes
SHA-256: c350ac135fccdffeb2261b44eabfc8801b7993be30a6fa3ba0dead838bc155f1
font_02_sfnt_off00012a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1