Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0b2c0fe276a678…

MALICIOUS

PDF

74.9 KB Created: 2021-09-19 11:32:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f991677322f71d3e91f04a9d1f149e95 SHA-1: ef8efec2aa8e2bba18629a6417b43b6cfc2cfad8 SHA-256: fc0b2c0fe276a678cbac26d4881acb4e622d8589bb62349893106b485511bd10
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV and a machine learning classifier as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are on disposable hosting and utilize UTM parameters, indicating a link farm designed to redirect users. The primary attack pattern involves luring users to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://laborke.ru/uplcv?utm_term=thiago+messi+full+name PDF link annotation
    • http://motivationandmomentum.net/ci/userfiles/files/81081768788.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/lojujitopebewatelokej.pdfIn PDF document text
    • http://zeshengtecphar.com/UploadFiles/FCKeditor/20210917220346.pdfIn PDF document text
    • https://mygoaltv.com/ipp/images/uploads/files/jagamukuvifinimaze.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/rajudamelaru.pdfIn PDF document text
    • https://wupaojichangjia.com/d/files/17213901381.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4624de51e---71109667364.pdfIn PDF document text
    • http://standdominica.org/files/files/4966838095.pdfIn PDF document text
    • http://ssp.by/var/upload/pezesunudolekuwojurad.pdfIn PDF document text
    • http://nadafashionbelt.com/Uploads/file/vepenopovazos.pdfIn PDF document text
    • http://stopguepes72.fr/userfiles/file/jagogonatelobazolubo.pdfIn PDF document text
    • http://geojeoceanhotel.com/userfiles/file/20210917102759.pdfIn PDF document text
    • http://jucal.es/images/file/bujogagovoro.pdfIn PDF document text
    • http://newcityhk.com/userfiles/nukuzolik.pdfIn PDF document text
    • https://pvesc.vn/uploaded/file/gekebaxalamozanovefegaga.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/161344c04ef398---26153415534.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16144e62d408aa---bivititofarozudalowigozux.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/161462655b77b3---66019714189.pdfIn PDF document text
    • http://zuche0551.com/upload/file/51624827271.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/fojevukut.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/94593723196.pdfIn PDF document text
    • https://basealimentare.it/webroot/files/fck_uploads/File/66736816690.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/38150254274.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_off0000be0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE0F 18680 bytes
SHA-256: 94298aa7e5193f1390fe1e3733b367025e2dbd2ba64b941a689b9782646af7ba
font_01_sfnt_off0000ee52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE52 10524 bytes
SHA-256: 29884dfc27ddd0e31f21e3e5a8736978a4e5c740d715906b9f87c90e5b2aa648
font_02_sfnt_off00010613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10613 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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