Malicious PDF — malware analysis report

Static analysis result for SHA-256 c699f6d24b8d2999…

MALICIOUS

PDF

69.7 KB Created: 2021-09-26 15:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6b5bac7a474387125bd629aca735c78b SHA-1: a33a4c2fdafad4faada02e59fd98d19bcc264d07 SHA-256: c699f6d24b8d2999a1470ead73a99548008a54fb402d76d07d3e864a42f23ed7
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical of phishing attacks, containing numerous links to external sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://crewmak.ru/uplcv?utm_term=game+booster+for+free+fire+2020 PDF link annotation
    • http://yaqeen-eg.com/userfiles/file/89605094033.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/89083645198.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/raxegakumu.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/97560788621.pdfIn PDF document text
    • https://quangtriasianwindow.com/uploads/image/files/rubikisekavudojoko.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/tazoneja.pdfIn PDF document text
    • http://vce34.ru/attachments/file/pabizeled.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/binofuxokajijubefi.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/xapara.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/94570659997.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/33659976835.pdfIn PDF document text
    • http://maydemtienvn.com/upload/files/bupuxogugolixunomubofuba.pdfIn PDF document text
    • https://www.temtechnologies.fr/ckfinder/userfiles/files/88721239493.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/8427542852.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/safiwom.pdfIn PDF document text
    • http://aeklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/81106828117.pdfIn PDF document text
    • http://rotang.net/userfiles/file/25511475203.pdfIn PDF document text
    • https://jnnjhansi.com/userfiles/file/jufavopeki.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/bokewanidusijunigiz.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/waxezabedazubo.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/b289i7ckekouigaofh42onkdv1/dexesumufujefo.pdfIn PDF document text
    • https://ximatinhdongnai.com/app/webroot/files/images/pages/files/86981816134.pdfIn PDF document text
    • https://nuteuit.ro/ckfinder/userfiles/files/wivokidopapuz.pdfIn PDF document text
    • http://stimatacasa.eu/userfiles/files/bizoguf.pdfIn PDF document text
    • http://youngdongtec.com/userfiles/file/vunaxedu.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/48165782831.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_off0000b42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB42E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC40 14388 bytes
SHA-256: b18ecaf4d03dc1570ace524450c94369e905b2f4104385de01856783af035ef5
font_02_sfnt_off0000f054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF054 10644 bytes
SHA-256: 6f22f15e614b463975308a71b9030c974140fe526898046365eace4c7b73fe30