Malicious PDF — malware analysis report

Static analysis result for SHA-256 beda78df86b4f19c…

MALICIOUS

PDF

82.2 KB Created: 2021-09-16 15:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 893a14e140cabce3cf77da8c1bc1db87 SHA-1: a2fa9461d3455d9934faa117dd2e6df18d92553c SHA-256: beda78df86b4f19c62ea82a6d3b3ea1196d1c2eebfe9feec83eb7435e5271153
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which are on disposable hosting, indicating a link farm designed to redirect users. The presence of external URIs and the overall structure suggest an attempt to direct users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://pixomot.ru/uplcv?utm_term=derby+crash+unblocked PDF link annotation
    • https://drinkpoint.com/uploads/files/feterixivukixegon.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/21623939016.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a028ddff1e---35679931945.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/92799833374.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name/files/87056343697.pdfIn PDF document text
    • https://peusch.lu/userfiles/files/26512822257.pdfIn PDF document text
    • https://camphacement.vn/upload/files/ponanuvis.pdfIn PDF document text
    • http://sumtinathholidays.com/admin/uploadfiles/file/bojoru.pdfIn PDF document text
    • https://buyafranchise.org/files/files/11162559090.pdfIn PDF document text
    • http://ctnphrae.com/ckfinder/userfiles/files/38425512117.pdfIn PDF document text
    • https://sunnyrosesschool.com/userfiles/file/bifet.pdfIn PDF document text
    • https://indiantiffin4me.com/nbloom/fckuploads/file/77113344609.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/gijofowixegowanene.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/sonifuf.pdfIn PDF document text
    • http://fractinvest.com/uploads/file/zirer.pdfIn PDF document text
    • http://karmakonnect.org/DrumiBhatt/karmakonnect.org/Final/ckeditorimage/files/93498485283.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210914_D2B4311F714FF089.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0bbabecb5---donamamexabavokoroju.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/20480501613.pdfIn PDF document text
    • http://webminmax.com/userfiles/file/8884414283.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/23514951510.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/nuzotukaxazizawet.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_off0000dc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC85 10724 bytes
SHA-256: 1d8bd6776b8cc6148e8a746a85eefaefccabdd88648946cacd0b09e91e729437
font_01_sfnt_off0000f51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51A 18012 bytes
SHA-256: 89d90a8ee45425229cb797848b5e8482b02840d1108e300d63be30f66ace25e6
font_02_sfnt_off000123a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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