Malicious PDF — malware analysis report

Static analysis result for SHA-256 342d0d03e9acc8c4…

MALICIOUS

PDF

82.2 KB Created: 2021-09-19 00:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2e5b74af315e751ecf9f5e961079aed0 SHA-1: f773a3801f8a10b2e45a8c6c5c1352e35f667850 SHA-256: 342d0d03e9acc8c44324e39c4f352a84bf913a7b8c7545dfb15c7dd5032e4a9b
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of a remote support lure. The document's structure and embedded URLs suggest it is designed to trick the user into downloading and executing malicious content, potentially via a second-stage payload. No scripts were extracted, but the overall pattern indicates a phishing attempt leveraging a remote support pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=accessing+android+phone+from+pc+wireless PDF link annotation
    • http://emeraldcovepartners.com/_data/images/file/29491333255.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/1397126e4c5085b88c231952cbcc6fc9/73153664667.pdfIn PDF document text
    • https://asiapharma.la/files/files/4334950537.pdfIn PDF document text
    • https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/lojafe.pdfIn PDF document text
    • http://lnhaihui.com/userfiles/file/20210906011808_869789401.pdfIn PDF document text
    • https://xn--72ca1bzcdf9cg5df4n5a8cei.com/userfiles/files/rikixeposoledami.pdfIn PDF document text
    • https://chasehr.in/userfiles/file/pejutidagon.pdfIn PDF document text
    • https://autopsrus.aerovents.com/ckfinder/userfiles/files/kanefexerunujew.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/retudetufopipokukebamok.pdfIn PDF document text
    • http://www.kymenhome-etsinta.net/tiedostot/files/titidevemizomerova.pdfIn PDF document text
    • http://holzweiss.at/goketositunazubifugixaref.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/65143171649.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/jovijukoxeritute.pdfIn PDF document text
    • https://bkairconditioner.cloud4demo.com/uploads/files/47153472777.pdfIn PDF document text
    • http://toroisg.com/public/images/files/10602755754.pdfIn PDF document text
    • https://phnews.ro/files/file/xofiluj.pdfIn PDF document text
    • http://www.astmalek.cz/obrazky/file/tizalim.pdfIn PDF document text
    • http://biosite.ru/images/news/file/gakuvukezuvubanotosuziti.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/76681543766.pdfIn PDF document text
    • http://balogmihaly.hu/UserFiles/file/82626558702.pdfIn PDF document text
    • http://weldingplaza.com/files/file/67856207048.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1614274c6444ec---18992982097.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/xojolixawemafamufenisiwo.pdfIn PDF document text
    • http://playoz.com/ckfinder/userfiles/files/januzowifis.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/86898448273.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_off0000d96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF181 11036 bytes
SHA-256: c682fd5b538c1b58eec01858494183851333857fc82a2264dbe1fdd23d45e1d5
font_02_sfnt_off00010ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD5 18492 bytes
SHA-256: 14e547852e5437e6bacd79aa870ed191a20077c36bc37c26fc4fa7457ee561c0