Malicious PDF — malware analysis report

Static analysis result for SHA-256 27456de8415a3420…

MALICIOUS

PDF

79.2 KB Created: 2021-07-31 11:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6ca50850a3965c8e0ca30961367a8a79 SHA-1: 6d94f5b7bda16bbadec55061ce14d029f9c2a849 SHA-256: 27456de8415a3420fa945478575938133e9ce8d54d8e140b8b02d47ff32ee3b3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a password-protected archive lure. It contains numerous links to potentially compromised websites and disposable hosting, suggesting an attempt to distribute further malicious content. While no scripts were directly extracted, the PDF structure and embedded links indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://bobmeetin.com/media/galleries/files/17543224635.pdf In PDF document text
    • http://hollywoodterrace.org/clients/863344/File/43293850992.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160796160a232e---852786607.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/tuwirupera.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c88ca3557---9780571716.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878faf1de4c---8791336702.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/98619151919.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20210624_E98CD4CC646683C5.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078682e8ec36---ponet.pdfIn PDF document text
    • http://0930actress.com/files/files/tedufenidezokelusonisisoz.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/4939023375.pdfIn PDF document text
    • https://service-panev.com/userfiles/likag.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/fisojegemuwimedexavuta.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/8e03051cfb2ec13820b5593862aad451/71009289234.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160889d32e414c---28583930682.pdfIn PDF document text
    • https://kottayammedicalcollege.org/CMS/ckfinder/userfiles/files/49113015385.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/61761371181.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/28589118411.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e671cf59680---vubanoluwiguzuwutira.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160975edf4b2bc---nagirofiz.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/db75224943d1926599978193980a2a08/86174108344.pdfIn PDF document text
    • http://nkcophs50threunion.com/clients/0/01/014062e559e26c1cf0711bcec4e573ae/File/46043858059.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075f62bed465---fonilosuzesokipamur.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/tavib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+do+i+reset+my+voicemail+on+my+toshiba+office+phonePDF 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_off0000cf3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3B 17276 bytes
SHA-256: d4a60197960e3c393405adb4bec74f7eaaa3dcd6092ec5fe146056184da60497
font_01_sfnt_off0000fc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC65 11284 bytes
SHA-256: 884c326ae13d6553486599f245833867750df220a11bd984927e8903cff28080
font_02_sfnt_off0001167b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1