Malicious PDF — malware analysis report

Static analysis result for SHA-256 c610ec27740663a5…

MALICIOUS

PDF

68.0 KB Created: 2021-09-21 07:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7bc78bfc5861a31515e6cef26342a8ea SHA-1: ff4a0020559c0d5bcc6c291e9af9df85cbdd03b2 SHA-256: c610ec27740663a5821ff2f5857f1db3c11da0835d570493f4b3a8480d07c18c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. The document contains numerous embedded URLs that function as a link farm, attempting to direct users to download content, disguised as free movie downloads. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 5

  • 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.
  • 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://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/43951138646.pdf In PDF document text
    • https://securitydm.eu/slicice/file/biwevejudufizixif.pdfIn PDF document text
    • https://weldingportal.it/userfiles/file/rafojoxeb.pdfIn PDF document text
    • http://fabriziocar.it/userfiles/files/seloluzavafidanipebutu.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/tikapodelotopixonun.pdfIn PDF document text
    • http://a-b-i-s.net/layout/bilder/file/pezep.pdfIn PDF document text
    • http://vdi.vn/userfiles/file/59061021093.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/fimipivitav.pdfIn PDF document text
    • https://bselink.com/userfiles/file/64704113736.pdfIn PDF document text
    • https://claudiodituri.it/uploads/xelizedajefejev.pdfIn PDF document text
    • http://citysoupsbellevue.com/uploads/files/76499955771.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/fadipekebem.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/9791448571.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/107451333.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/wuvupudusowuwoluveligowe.pdfIn PDF document text
    • http://mrcubezpieczenia.pl/app/webroot/media/files/7969574278.pdfIn PDF document text
    • https://kiptep.ru/file/51079689.pdfIn PDF document text
    • https://euronet.stonavka.cz/webpagebuilder/ckfinder/userfiles/files/52044261972.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/57288013086.pdfIn PDF document text
    • http://ibrahimabuomira.com/ckeditor/ckfinder/userfiles/files/bemos.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/2033899333.pdfIn PDF document text
    • https://xn--lenachatka-57b.pl/uploaded/file/51724826045.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/53090337501.pdfIn PDF document text
    • https://history.tlshaa.org.tw/ckfinder/userfiles/files/91947311244.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=movie+box+free+download+for+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_off0000aef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF8 10468 bytes
SHA-256: 663d01ccfa35ff377c44368485c7c169fbd346dc88cd27e5863642382a360f2f
font_01_sfnt_off0000c6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E2 14304 bytes
SHA-256: af537b4721324cec929f46f9c13b2fd98d8f3f99f1590a772b9b08d45760aa3f
font_02_sfnt_off0000eaa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1