Malicious PDF — malware analysis report

Static analysis result for SHA-256 7495eea2812866b8…

MALICIOUS

PDF

89.2 KB Created: 2021-08-01 05:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ae237bd1d1e401c7197e3b869a27af13 SHA-1: 69c74ea992ff36f7f287575c94678921e14016a8 SHA-256: 7495eea2812866b8c2cc706f4b2407ced02aa72141b4467a4be9ce0343d49476
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to external sites, some of which are hosted on compromised CMS platforms. This suggests a phishing or redirection scheme designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://1careglobal.com/upload/files/bolotokazibizejokazojeduz.pdf In PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/60424828223.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/27751494359.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/pavewiwegakuweregede.pdfIn PDF document text
    • http://alpinedelhi.com/userfiles/files/betima.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/28834782641.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/81454372857.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/nobulupinisududibanabipob.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/768eae9625fb0ed34fe4dbe75a6c8e01/gerusubekikadija.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a717e7e7f51---93932606631.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/k07uj5u8r3fdfok38ncf5lhu48/vajotu.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160f9cfaca1e1a---88581029186.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b5ecbe1be---gitasodopujubirid.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/buporozoko.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/bslmed6f1s53tb18brsqv10eim/gigometanomiwosufovilav.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077fddb39e59---93010527721.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/levatiwudivunegumakani.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/72515058114.pdfIn PDF document text
    • https://adikketiga.com/contents//files/fogiluvom.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db4569925b5---dupajeropifuvaxabi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849dd5dbc6d---zoxazogilabolexil.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/98053203044.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/1fdaa6319c4650350f1d5aad7e1ea602/revipimu.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/dekoruwutibaxuzobiruk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=como+se+prepara+la+cebada+perlada+para+beb%C3%A9sPDF 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_off0000f6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF4 17648 bytes
SHA-256: 3d936d8d724b55fe429bcb9dcc5dd310825f1fcecc792ea72dbd18b93460bcea
font_02_sfnt_off00013b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B38 10704 bytes
SHA-256: e9236a20e527c42a4cb4b00d710ba152d10df9f12aaebfdfad200087c1be3b77