Malicious PDF — malware analysis report

Static analysis result for SHA-256 9abfb463122f346a…

MALICIOUS

PDF

69.9 KB Created: 2021-10-01 04:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 71bebbdbf4e8525aa68422b9bac67e11 SHA-1: acac538b6017da148a8a923be70e6e5825cb08b1 SHA-256: 9abfb463122f346a1d5cbf63eaecfb275d7c79374686e10b25e41b2cc9679730
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm on disposable hosting, indicating a strong intent to redirect users to potentially harmful sites. The PDF structure and embedded links suggest it's used as a lure, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://crysiq.ru/uplcv?utm_term=efootball+pes+2021+apk+obb PDF link annotation
    • https://5udua.com/contents/files/51483226045.pdfIn PDF document text
    • http://olympicthesportshop.in/uploads/dobakudakipusotosub.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/6369fb24b03fa7e3faef7833c942dafd/66118329799.pdfIn PDF document text
    • http://agarimo.com/archivos/archivos/78882469941.pdfIn PDF document text
    • http://izmirtavla.com/upload/file/94701605649.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/zopotefa.pdfIn PDF document text
    • https://breedlife.com/upload/files/sagulibisom.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021090804301756425.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/jenir.pdfIn PDF document text
    • http://thegoshow.net/userfiles/file/wofarevoxorot.pdfIn PDF document text
    • http://abwva.com/uploads/files/10758295490.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/temugagesoboj.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/vobadu.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210916024811.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/60271521563.pdfIn PDF document text
    • https://fix2go.info/userfiles/file/26410873622.pdfIn PDF document text
    • https://ever-progress.dacola.com/upload/files/60546841754.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/53162088372.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7981a1911---33240062682.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/65919588639.pdfIn PDF document text
    • https://miminku3.com/contents/files/63286435705.pdfIn PDF document text
    • http://sk4education.com/ckfinder/userfiles/files/zelawuxulenuluwanur.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/vivobibi.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_off0000b103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB103 10564 bytes
SHA-256: ea80702de6e2bf5f6ffec72d2d22fdf2924d249eed269b283b1f05fa85fae86f
font_01_sfnt_off0000c925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC925 16100 bytes
SHA-256: 0f81741d3fbf23736fd2fcd9b9e03b9ad8b56c1dfd3ecc2e01ce0cc20fbf7c35
font_02_sfnt_off0000f20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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