Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff6aba717aee0e9c…

MALICIOUS

PDF

82.9 KB Created: 2021-09-14 01:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 15d8040910a39698b31e9065354aed1c SHA-1: 434f9d2f4a1546e8047ccc3a9fe4da2eb654034a SHA-256: ff6aba717aee0e9c214bdf015bdb1bb0e5d09c62c01e5a2b015979191382b185
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to potentially malicious domains, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by indicating the PDF is part of a link farm designed to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://wumag.pl/userfiles/file/votapogizar.pdf In PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/80000708411.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload/file/59766244903.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/xuvositobabogojedomaza.pdfIn PDF document text
    • http://irvine.songhakbbq.com/uploads/files/godoguf.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/54462821120.pdfIn PDF document text
    • http://citra.cl/userfiles/file/92815659005.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/54064818139.pdfIn PDF document text
    • https://eric-parnes.shortex.com/ckfinder/userfiles/files/sojulijik.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/wowem.pdfIn PDF document text
    • http://precisao.org/files/files/vimiwuwefepavupolula.pdfIn PDF document text
    • http://www.astmalek.cz/obrazky/file/31329184323.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc7efa2648---xikunumagevipefonevepoz.pdfIn PDF document text
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/fipumov.pdfIn PDF document text
    • https://hawkseyetravels.com/assets/ckfinder/userfiles/files/22388447451.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/jeferipopupotedo.pdfIn PDF document text
    • http://cdenito.net/userfiles/file/xixidolinoxex.pdfIn PDF document text
    • http://xn--z92bzy85x.com/userData/board/file/pebeverupivusujajizugigog.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/fugotikizi.pdfIn PDF document text
    • https://rawoctane.com/uploads/file/xevepek.pdfIn PDF document text
    • http://epmachine.ru/d/files/nipugomovamojakibasoxe.pdfIn PDF document text
    • http://seteo-dechets.com/images/file/jisarosoxobetixubaninujij.pdfIn PDF document text
    • https://diamond-marketing.cz/soubory/68721230182.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=download+emulator+ps2+android+offlinePDF 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_off0000dbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D8 18284 bytes
SHA-256: 94961136c2c1e0a6996d21db0e254bc6d0a9139819d9bbf142ba51402131d6c0
font_02_sfnt_off00012485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12485 10964 bytes
SHA-256: bd691f2b19686706d731d13095d3c4816aede030aa7b3d5470eefb2bf80d2ce5

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