Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f422d49406ec1a2…

MALICIOUS

PDF

82.6 KB Created: 2021-09-10 23:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e3f77ae094aea9de2fadbacf6eef2ab8 SHA-1: a7f599138b7fe7ed2405052daaab2d4754ef18ac SHA-256: 2f422d49406ec1a290a496105f430e072170f0ac9a0511f6782ee7d167c47ebf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous external URLs, many of which are part of a link farm, indicating a likely phishing or malware distribution scheme. The PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=el+psicoanalista+pdf+gratis PDF link annotation
    • http://technology-mp.it/userfiles/files/69441756717.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/e39rfpeo3bl99r0u1ai5rlvm07/ziropupogazoxokudawij.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/lefij.pdfIn PDF document text
    • http://kingsap.com/file_media/file_image/file/lepagitifufomif.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134fb8b45fc7---77545673550.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/vojamu.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/84596820853.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/mozexotel.pdfIn PDF document text
    • https://detectagsafety.com/ckfinder/userfiles/files/45107123111.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210905042722922.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/1263463579.pdfIn PDF document text
    • http://www.gobarging.com/uploads/textareas/file/95758086790.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/15771106749.pdfIn PDF document text
    • http://wpchkg.com/upload/image/file/31775503012.pdfIn PDF document text
    • https://kar360.com/resimler/files/70633102435.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/70318418869.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/28857649575.pdfIn PDF document text
    • https://orcasproje.com/userfiles/file/jewikegixejunapoxapabufi.pdfIn PDF document text
    • http://eskuvotoszkanaban.hu/editor_up/50361688870.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/91614923483.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/mokediku.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/34907056644.pdfIn PDF document text
    • http://namkhoabacninh.com/images/files/wipabowemugadawodonol.pdfIn PDF document text
    • http://www.terresdescaraibes.fr/file/jijagakizugiwikemed.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_off0000dba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA5 10648 bytes
SHA-256: cfcca4d220202e32cc55da6cedb17a76d851d33708d7e6b2cbb19477dd6815c8
font_01_sfnt_off0000f3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DF 19092 bytes
SHA-256: 571e6df789d928d13f6d72b3aa0d6fa2abd9a2529f991acd4e09bb8aa1cc67d1
font_02_sfnt_off0001248e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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