Malicious PDF — malware analysis report

Static analysis result for SHA-256 3311082263c25752…

MALICIOUS

PDF

90.4 KB Created: 2021-09-23 20:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2c6f27070a5767dec728cbadca8570b5 SHA-1: 5e504bb5a586d00fa9ac8174783a4e9ae4af00e4 SHA-256: 3311082263c257520bfd4b5ef4b7315916e2b4d73ce93fb339b42f8fdd980660
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. The PDF contains numerous embedded URLs, many pointing to disposable hosting, and one specifically uses a 'free old movies' UTM term, suggesting a lure for users. The presence of these links and the overall structure indicate an attempt to redirect users to potentially malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://smidgel.ru/uplcv?utm_term=free+old+movies PDF link annotation
    • http://salondebellezaanamariaromero.es/ckfinder/userfiles/files/435141435.pdfIn PDF document text
    • http://tatishev.ru/admin/ckfinder/userfiles/files/golefow.pdfIn PDF document text
    • http://tomboy2.com/images/library/File/dotuwobopovuvudepem.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/32828215529.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/defuzusuruzeka.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/xezuw.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/25771069148.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021091905304373499.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/levawolumawopilale.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/wapovujepixapefogon.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/99058772774.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/m29ojn6tmvfii22fcl9f0dhr83/65276057713.pdfIn PDF document text
    • http://meditopthailand.com/file/80640757317.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/jowujikixepuderur.pdfIn PDF document text
    • http://sbcnepal.com/images/file/34785818775.pdfIn PDF document text
    • http://tayles.com/uploaded/91131673062.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/dunabuxugofizadilugopu.pdfIn PDF document text
    • https://rm-parketi.si/uploads/sebubuzawaxakivinu.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/kabawelirizopoke.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/6061373872.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/73311761300.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user//file/_0275881001631284114.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/34118059020.pdfIn PDF document text
    • https://kenhquangcao.vn/uploads/files/majafuzenozo.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_off00010134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10134 10088 bytes
SHA-256: 3c44b2ab7a382b5b72a538fd06da4df5ced43644f31ffe91d09edb97929b2892
font_01_sfnt_off000117a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBA 17228 bytes
SHA-256: c85552d0d1b3339a331ecb0c63ddbbce805b87af3e8032e0ae232b5074f4ce44

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