Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7e11ecd8c17594…

MALICIOUS

PDF

85.0 KB Created: 2021-09-23 21:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 2296c631b83898db09062e69862ed215 SHA-1: bc564b3b790ae60db65b79d729c5a7a7c371d8c1 SHA-256: ee7e11ecd8c17594ce5d2fc815e5376bf4bbd6aa9d8874d94bb8342e6a3831d7
226 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded links, suggesting a lure to either install malicious browser extensions or redirect users to phishing sites, potentially related to payment information changes. The presence of external URIs and a link farm pattern indicates a deliberate effort to host a large number of redirectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://queure.ru/uplcv?utm_term=how+to+transfer+my+android+contacts+to+iphone PDF link annotation
    • http://gardena.crazyrockinsushi.com/uploads/files/dadope.pdfIn PDF document text
    • http://spad.kr/userData/ebizro_board/file/26838959969.pdfIn PDF document text
    • http://npk-bypassdrr2.com/file_media/file_image/file/47313185690.pdfIn PDF document text
    • http://pr-jam.com/ckfinder/userfiles/files/63384620034.pdfIn PDF document text
    • http://villahetzwartepaard.nl/survey/userfiles/files/30068241921.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/35507469805.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/lawopidop.pdfIn PDF document text
    • http://vinabomi.com/uploads/userfiles/file/70185346946.pdfIn PDF document text
    • http://intersonik.eu/upload/files/wuputekatoguzubix.pdfIn PDF document text
    • https://posetili.ru/userfiles/file/pugisasarovepolir.pdfIn PDF document text
    • http://kfbma.org/files/fck/file/senapejivop.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/xirixixudaki.pdfIn PDF document text
    • https://8cj2aja7-8mxb.com/contents/files/61409485377.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/laxonawafawosekutozoko.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/77598555264.pdfIn PDF document text
    • https://perfecthospitals.com/FCKeditor/file/85910336052.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/wokufeketuzexolotuvapiv.pdfIn PDF document text
    • http://artio.pl/files/files/jaxipevawusomedevedeminu.pdfIn PDF document text
    • http://gearcon-eng.com/file_media/file_image/file/94503390429.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/68108012618.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1613245de91d2c---javojidixowadu.pdfIn PDF document text
    • https://equalland.com/uploads/File/muribemegubozumob.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///zosimesixa.pdfIn PDF document text
    • http://electriccityusa.com/images/fck_uploads/file/28451609823.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/76573764539.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_off0000e5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBF 11028 bytes
SHA-256: 8bbada937da62c339c9da35d8dd37fb0e615d696bd56a446fc00023b46c98fa7
font_02_sfnt_off00011744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11744 18388 bytes
SHA-256: 37b47d760ffdcb301fbf007885a011463cacc9b768aee9ec96e8126ce80e056d

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