Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c17ab88639525ea…

MALICIOUS

PDF

86.6 KB Created: 2021-09-15 15:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 392cfe0731030b2ab2868f96259ae20e SHA-1: 75212f0732d04afb7d02e64823fc90bbf9ae8785 SHA-256: 7c17ab88639525eae53ae5ae94e013c6700a02b5cd5a7e420abb6ff5583e3755
146 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The document contains numerous embedded URLs pointing to various domains, many of which appear to be part of a link farm designed to obscure the ultimate destination. The presence of 'utm_term' parameters and the structure of the URLs suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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 http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/9term21ohthpn8j5s71mt14mf0/bagenevijologivuropagale.pdf In PDF document text
    • https://mytekas.com/UserFiles/file/20612929901.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/darulovefojibulibelidinu.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210914_A366EAFA15B234BB.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/wazerawexofusax.pdfIn PDF document text
    • https://collinite.pl/userfiles/file/4393313449.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/ponup.pdfIn PDF document text
    • http://alltimescare.com/attachment/files/ginoponusipamukete.pdfIn PDF document text
    • http://feminella.ro/upload/fck/48559178637.pdfIn PDF document text
    • http://photou.cc/ckfinder/userfiles/files/bupojunaxovufamodenusinel.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/73201593260.pdfIn PDF document text
    • http://hfnhsw.com/upload/files/37400011239.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/3ba1fdbc7be5e021face9e37896be850/23492900465.pdfIn PDF document text
    • https://pensiuneaselina.ro/userfiles/file/5459143644.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-9-9/20210909165309228308.pdfIn PDF document text
    • http://another-partner.morefriendship.com/upload/files/jiragesigutamulim.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/tajoluluxaxenaverotimapuz.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/95304192630.pdfIn PDF document text
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/kedajepugamorupixojo.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/1391353343613e0543ad6d2.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/tuzarekulapifisakelisavuz.pdfIn PDF document text
    • https://karlholmbygg.se/UserFiles/files/5594646634.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=apunkagames+gta+5+androidPDF 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_off0000edb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB7 10996 bytes
SHA-256: eba37955e4a2e002f727526412a16625d0b3c45b9b137c1f78d797bb01c2d6eb
font_01_sfnt_off0001072a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3C 17772 bytes
SHA-256: 998525b8e6224f59b0bb258a56af1fb4b9f935cbd14258ab13b4b715fd82c8df