Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eacb8b5b2889355…

MALICIOUS

PDF

81.3 KB Created: 2021-09-13 06:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: c7145a4f4abd0c90210a8354b676b1c7 SHA-1: bf22bd3651cd8c413a108620162825b6795466ff SHA-256: 8eacb8b5b2889355e2c56a654ec739f828be7864d7c4ae601fc05e70b4e9cb9d
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://jnmindia.com/outscapes/admin/ckeditor/uploads/ck/files/61625717663.pdf In PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16138551143cf9---nonovuxodu.pdfIn PDF document text
    • https://brtim.com/uploads/wysiwyg/files/gikuwubaxani.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/rigabelinugejogizafi.pdfIn PDF document text
    • http://musicincw.com/fckeditor/userfiles/image/bodami.pdfIn PDF document text
    • https://karpataljaturizmus.hu/upload/5429439709.pdfIn PDF document text
    • http://furniture83.com/upload/files/vijunapowumisukes.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/9592449832.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/37460725149.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16134af8eda12f---kugaribazetuzugagus.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/12164815168.pdfIn PDF document text
    • http://xn--franzsischebulldoggen-lec.eu/userfiles/file/95636626872.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/xupege.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/79688494132.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/tudozup.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/15964826768.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/51635676685.pdfIn PDF document text
    • http://gz-chengeng.com/uploadfile/files/69754860139.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/56717441356.pdfIn PDF document text
    • http://sanyosushiglendora.com/uploads/files/rawugera.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/bejubuzogopopurif.pdfIn PDF document text
    • http://cosmik-kinoteatr.ru/sadm_files/tagimujagonikejizezixejum.pdfIn PDF document text
    • https://mimpisiluman.com/contents/files/lijasimuderenivijutak.pdfIn PDF document text
    • https://wupaojichangjia.com/d/files/karubademanimalepulupuxan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=faug+game+linkPDF 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_off0000db45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB45 10136 bytes
SHA-256: b9290b3d776882317eea04cb5ea90c9509d8edcabb4cad5b470709550465f8e4
font_01_sfnt_off0000f1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C0 18080 bytes
SHA-256: df7259856be5fd43bde79a07963db5994101cc35bbdfac91764a3b00f2686569
font_02_sfnt_off00012014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12014 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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