Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c983678d597e44…

MALICIOUS

PDF

79.1 KB Created: 2021-02-17 02:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 702b4ceeec8a2d0d84de0a8b6f86e71c SHA-1: 6e921515148a588c9c15c767aa2cd60bc7a87b4f SHA-256: d0c983678d597e440de0dc4cf4de1fec92d1570aeec47fb68a858472ee31cc3e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/aws?utm_term=what+is+computer+science+and+programming PDF link annotation
    • https://cdn.sqhk.co/guwaloxipete/jar6hbx/magic_lantern_camera_list.pdfIn PDF document text
    • https://cdn.sqhk.co/pofilese/fAjhzC5/sinoritidijesikajalasube.pdfIn PDF document text
    • https://cdn.sqhk.co/kevejonob/AYiiY3M/hashtags_for_youtube_gaming.pdfIn PDF document text
    • https://cdn.sqhk.co/bulegumu/gigYigo/chocolate_mousse_frosting_recipe_easy.pdfIn PDF document text
    • https://cdn.sqhk.co/movozuba/eI8jfsN/51344072472.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fizup/python_3._5._2_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/karmakhali_bengali_news_paper.pdfIn PDF document text
    • http://senusekavopodu.rf.gd/vafej.pdfIn PDF document text
    • http://jasetaroxakil.rf.gd/37917811545.pdfIn PDF document text
    • http://rodobokojezaga.epizy.com/gangster_full_movie_hd_filmywap.pdfIn PDF document text
    • http://befadiw.rf.gd/how_to_use_sony_camera_as_webcam_windows_10.pdfIn PDF document text
    • http://zukusuvajijip.epizy.com/ninarenivumukasawiwite.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/35391927758.pdfIn PDF document text
    • http://bolunivagoxel.epizy.com/62474611783.pdfIn PDF document text
    • http://jowevoxajez.epizy.com/eba_guidelines_new_definition_of_default.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/bachelor_of_business_information_systems_torrens.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF919 5468 bytes
SHA-256: c6ad1a5479f56428f3847b0e42c2dc6e3a9e22aea90ff347565ad4cceda87d8f
font_01_sfnt_off00010b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8C 10352 bytes
SHA-256: 28f453c97c8607591959dbb16847edf33abed12bd48ffcdfed7ebc2a952039fa

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