Malicious PDF — malware analysis report

Static analysis result for SHA-256 463c698185d9d147…

MALICIOUS

PDF

82.4 KB Created: 2021-10-08 02:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 7310d51e4016809083dcf5f820b41507 SHA-1: c5b8ea8af0ec8e3a8da24ba5853e1f8dd413a4eb SHA-256: 463c698185d9d14712fbee1605c5428dc2ccaf2d5900be0c67c8224998686838
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While 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 0.9911

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://pistant.ru/uplcv?utm_term=how+to+share+from+imovie PDF link annotation
    • https://cserepakciok.hu/xdata/file/54629697007.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/40157483006.pdfIn PDF document text
    • http://espwireless.net/uploads/file/dixidit.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/78341548822.pdfIn PDF document text
    • http://stimatacasa.eu/userfiles/files/73703757480.pdfIn PDF document text
    • http://hklh.vip/data/attachment/file/94349607701.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/88761271924.pdfIn PDF document text
    • http://hanleyresources.com/images/82086482028.pdfIn PDF document text
    • https://kocarbon.vn/luutru/files/pobuxigakubujogidobu.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/59130625552.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/mipap.pdfIn PDF document text
    • https://ukmalayalamnews.com/userfiles/file/binifen.pdfIn PDF document text
    • http://nhanvietgroup.com/demo/xay-dung-tnx/upload/files/39570687424.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/7680712654.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/85157210857.pdfIn PDF document text
    • http://marupi.de/UserFiles/File/woxifoxawu.pdfIn PDF document text
    • http://portakalweb.net/home/portakal/public_html/ckfinder/userfiles/files/suzejafefupife.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/68704210790.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/u910hbuamkv9e5h9bdpo06d283/81467416709.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/33159224271.pdfIn PDF document text
    • https://digitaluzaktanegitim.com/calisma2/files/uploads/pewugefumalokapej.pdfIn PDF document text
    • http://hidramaco.com/files/files/47138782118.pdfIn PDF document text
    • https://net-mex.hu/ckfinder/userfiles/files/naxosebekonaruzenami.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/4b0c7d4abf7648b4759752d68e3bcf91/74402285766.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/60f7677ebcfc2829078deb6a1d293db2/75446176502.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/6011543797.pdfIn PDF document text
    • http://taborgospelassembly.com/userfiles/file/filubuzufojoxepelo.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_off0000e01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01E 16776 bytes
SHA-256: 3973ed4160fbc312a19ece5bc77f5e46e0fcf9eb99e11c60ab1fd913b556c124
font_01_sfnt_off00010baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAF 10472 bytes
SHA-256: 929a292bf41b058c12b452b01dc1ce7d6ca798b32731f83b3c4d602e97e0611e
font_02_sfnt_off0001238c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1