Malicious PDF — malware analysis report

Static analysis result for SHA-256 f01c2255b5fb64a7…

MALICIOUS

PDF

92.6 KB Created: 2021-09-22 09:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 749f8780dde509fd6a47097e827f89a0 SHA-1: 279987fc7c4c8dc352117a470d0919667419bf34 SHA-256: f01c2255b5fb64a76b03be87227c8a007d5513ed319ea555f546ab425588e56c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. It contains numerous external URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The PDF structure and embedded URLs suggest an attempt to redirect users to malicious websites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=mi+box+photo+viewer PDF link annotation
    • http://archive-2014.humandoc.pl/attachments/file/goxidi.pdfIn PDF document text
    • https://tranthachcaodanang.com/uploads/image/files/23459847027.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/geponosafonepob.pdfIn PDF document text
    • https://etest.vn/app/webroot/uploads/files/18208379876.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/200031099139.pdfIn PDF document text
    • http://mama-care.com/UserFiles/file/85415944446.pdfIn PDF document text
    • http://crm333.com/documentos/file/10232468391.pdfIn PDF document text
    • http://www.abcklima.hu/data/editorfile/29863374251.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/wegasod.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/43641816710.pdfIn PDF document text
    • http://thekreativecompany.com/uploaded_files/userfiles/files/40810035723.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/46698646439.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/dagajimimotosizejuxuvina.pdfIn PDF document text
    • http://simoncaulkin.com/images/32447105881.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/87144855735.pdfIn PDF document text
    • https://lochoanggia.com/upload/files/60769467779.pdfIn PDF document text
    • https://samajsutra.com/userfiles/files/wilabanigaf.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/zudamididefika.pdfIn PDF document text
    • https://securitydm.net/slicice/file/megeniwakexabogas.pdfIn PDF document text
    • https://theipbuzz.com/images/file/tufukapenodumofani.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/tozewusukasixazona.pdfIn PDF document text
    • http://telecycling.info/files/file/31039789202.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/89193486148.pdfIn PDF document text
    • http://ckm-machinery.com/userfiles/files/86076435660.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/69907315838.pdfIn PDF document text
    • https://loyalangkorapartment.com/userfiles/file/boxawevelemelozalaxew.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_off0001067d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067D 10256 bytes
SHA-256: b714b56920a03d8db5938a07c3e08bf82b8fd0e99c99656b5c2137b49606f1a0
font_01_sfnt_off00011d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13591 18292 bytes
SHA-256: 89cf68156e724b02c37e750278751bfaedb8951599fc204cfe1af7cf8e56586b

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