Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e0c50e9d0211db…

MALICIOUS

PDF

71.4 KB Created: 2021-09-15 20:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e9cfdc2da8805c76faab215ac263ab66 SHA-1: 5d109a0bcaff1a4bb0317672b387ead8889abeb7 SHA-256: 29e0c50e9d0211dbfabef96892a9848b62c8e54d65facf4f4f6c4758fa907984
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links pointing to disposable hosting, suggesting an attempt to obscure the true destination or distribute various malicious payloads. While no scripts were directly extracted, the presence of embedded URIs and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/78753493123.pdf In PDF document text
    • https://elminhaj.org/userfiles/file/57632622349.pdfIn PDF document text
    • http://falegnameriacastiglione.it/userfiles/files/miwadarusebevisu.pdfIn PDF document text
    • https://etest.vn/app/webroot/uploads/files/14783859704.pdfIn PDF document text
    • http://etoprosto.ru/ckfinder/userfiles/files/34260440209.pdfIn PDF document text
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/64369790572.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d8175c3ce---lipefuxopipejaza.pdfIn PDF document text
    • http://partnercable.com/files/51992784411.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/71389637069.pdfIn PDF document text
    • http://hyundaihungthinh.com/uploads/images/files/8625833519.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/sumaretusobosatelabemamez.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132de399d0dd---rokasixezapalukogopusen.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/fagibujisiraban.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/sudexogikumubazikimem.pdfIn PDF document text
    • http://studiotecnicoforace.eu/userfiles/files/39098134747.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/69288664239.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/nuwezisozuvazawelizemil.pdfIn PDF document text
    • https://smg.bid/ckfinder_userfiles/files/ketozoverixovad.pdfIn PDF document text
    • http://flairpens.ru/uploads/file/20165089819.pdfIn PDF document text
    • http://studiochiodo.eu/userfiles/files/81628841431.pdfIn PDF document text
    • http://way-of-spirit.ru/upload/file/8562157318.pdfIn PDF document text
    • http://xn--80aafbjcazdrhzgiddbbcsg4l.xn--p1ai/pict/file/40533978447.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/wimob.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/ketupofisurojasiduwo.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/mumuzuvuzaripiwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=run+games+for+android+free+downloadPDF 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_off0000b86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB86C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07E 15152 bytes
SHA-256: 9b0cf3e5213d279d888cf07bf163ddcb1167ddd339a5f71b91633895a1dfd7bb
font_02_sfnt_off0000f672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF672 10828 bytes
SHA-256: de024d55de34ed8dd95667341fe48622ffab943d8ed989fa3ade0adf24d8383b