Malicious PDF — malware analysis report

Static analysis result for SHA-256 beee39d5f0363109…

MALICIOUS

PDF

71.6 KB Created: 2021-09-16 07:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c5f6f49299977e3602582211ed205591 SHA-1: 2ba47d99bfb13d3a64dff67b5cd294e74328dca4 SHA-256: beee39d5f03631095d0476202b6b5677687850f6186e3810ca9499e5fca979c5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to external PDF files, suggesting a link farm or redirection mechanism. The presence of external URIs and the ML classification strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://bloomland.com/sites/bloomland.com/files/damiwafubuvovis.pdf In PDF document text
    • http://urgentcarepb.net/userfiles/file/14996673936.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/91272986924.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/kexifinizodufigas.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/vanozipunomenimeto.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/maxibisifarawetivanutaf.pdfIn PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/foregetunalupesajivedaj.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/87027898228.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/28376970186.pdfIn PDF document text
    • http://fred-robin.com/ckfinder/userfiles/files/23463487284.pdfIn PDF document text
    • http://hijoin.hu/editor_up/xibanas.pdfIn PDF document text
    • http://skomi.ru/img/files/file/52651825133.pdfIn PDF document text
    • http://sor1310.com/userfiles/file/poxusefakumoxonari.pdfIn PDF document text
    • https://cleartunemonitors.com/ckfinder/userfiles/files/38561879443.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b3b51cef8---juravipilov.pdfIn PDF document text
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/55439697924.pdfIn PDF document text
    • http://balie.overeembv-profielen.nl/upload/files/30090700828.pdfIn PDF document text
    • http://miass.realxenon.ru/uploads/files/pemufarenirefif.pdfIn PDF document text
    • http://medtravel.pro/images/hand_uploaded/files/96795654334.pdfIn PDF document text
    • http://zuche0551.com/upload/file/7682322898.pdfIn PDF document text
    • http://dhf-china.com/d/files/kixirabebusewira.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613bda5d7c1fb---dubuzikekewasoneboku.pdfIn PDF document text
    • http://rayanchem.com/d/files/napubar.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/96447875377.pdfIn PDF document text
    • http://dakmet.pl/upload/tafofabe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=pokemon+emerald+catch+rate+cheatPDF 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_off0000b741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB741 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF58 10468 bytes
SHA-256: 8b7fc66f60ee031b8f891dc82fb35e5405ae089143c5e22be2a3a73c8fbc8819
font_02_sfnt_off0000e6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E4 16036 bytes
SHA-256: 418e4a4d1fd260249128bb3b5144054ff71a2ac7aa35254203737eb81d7a4b2e

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