Malicious PDF — malware analysis report

Static analysis result for SHA-256 2519231a14277f36…

MALICIOUS

PDF

87.5 KB Created: 2021-09-18 18:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bd21915e51a43667bb6808d85a26869e SHA-1: 571e6e5c2cc7461c6ffa6c549c71d337e2272a83 SHA-256: 2519231a14277f363e081db9cae8b26723de077a09800e8f27b7ce317e530ed6
174 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. It impersonates a cloud document sharing service and includes a visual download button, directing users to potentially malicious URLs. The presence of numerous external URIs and link farm heuristics further supports its role as a distribution vector for malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=transferring+photos+from+iphone+to+android PDF link annotation
    • http://werkkledingverkoop.nl/images/docman/files/linifipofilu.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210912_24F0E1A5074A99EA.pdfIn PDF document text
    • http://euromarkcreations.com/new/fck_img/file/fejetusojezudewi.pdfIn PDF document text
    • http://orthocarecentroortopedico.it/userfiles/files/68126118053.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16132f2af716ad---7554274614.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/rofajigasikupa.pdfIn PDF document text
    • https://biographiewerkstatt-singer.de/userfiles/file/gafexome.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613153ec6d771---62528689770.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/najizitiwedinide.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/lodazaginoj.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/pikavuwukapenolagupipaso.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddb4b89195---ginifafugimedofoliron.pdfIn PDF document text
    • http://transgusto.ch/userfiles/file/20111969568.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/delojisesedubi.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/sefuvibejiwe.pdfIn PDF document text
    • http://master-stroi76.ru/userfiles/file/56898417887.pdfIn PDF document text
    • http://taxplus.in/images/contentimages/files/sowefutixagajakeselomenuk.pdfIn PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/lubeva.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/zejevogirugirutotunak.pdfIn PDF document text
    • http://swissies.lt/ckfinder/userfiles/files/vizemader.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/mizajan.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/92023193505.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_off0000f1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A4 17860 bytes
SHA-256: d8540253f464117bcddf263de641b85afaa89f932e3b95c0b224322946a6fcfa
font_01_sfnt_off00011f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AF 10860 bytes
SHA-256: b833c922809eb3ca9b764640faec0f9eb900025e7b7864b7f60e0463721726c9