Malicious PDF — malware analysis report

Static analysis result for SHA-256 5143679b7e18889c…

MALICIOUS

PDF

74.4 KB Created: 2021-03-07 22:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 38b3bd1708752649d34841df8f77590b SHA-1: 536d6428ae4a8b077c77eb52b104b71d2443fed1 SHA-256: 5143679b7e18889cf45044141d3b87f4d392027523b49045ed7c2f4ccb45f24d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a site that hosts further malware or phishing content. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/wix?keyword=atomic+mass+worksheet PDF link annotation
    • https://cdn.sqhk.co/xesozugis/jjlgdGp/shooters_world_powder.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/turbochef_sota_oven_manual.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/namawalobewozujaxifafa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501029/normal_5ff27bfad3ca6.pdfIn PDF document text
    • http://sawedes.mywebcommunity.org/short_plot_summary_of_the_maze_runner_book.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/jfhfDve/super_mario_64_ds_cave_dungeon_music.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/tufapomogizu.pdfIn PDF document text
    • https://cdn.sqhk.co/sowanigog/ghqgclC/6405628260.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490725/normal_602e256f06bf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390660/normal_5ff434034e524.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366969/normal_5fcf0622ea785.pdfIn PDF document text
    • http://vopugixeroramox.medianewsonline.com/how_do_you_change_the_brightness_on_a_calculator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450723/normal_600e2646ebf5d.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/shark_ion_robot_vacuum_r75_with_wi-fi_rv750_reviews.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kipazafar.atwebpages.com/mixeredemobax.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/cereal_box_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/ridexajomeridabogakujofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc6608b7-31e2-424b-aca3-2990a2ec9392/budonagesewuvorevaguwid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3985a499-5483-4939-9c33-b7a56d28d63f/96886066098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed719766-b7cb-468f-bfe0-7ccf8e23da63/viktor_frankl_logotherapy_book.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/dibs_in_search_of_self_virginia_axline.pdfIn PDF document text
    • http://zedofaxuboz.onlinewebshop.net/2011_dodge_avenger_ac_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/foxtel_sports_tv_guide_tonight.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/jegake.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_off0000e5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FD 5152 bytes
SHA-256: 8b6e4a0deb6b6acbd0aba9809b7b63027c80910f5d5507a53621c315b7cbf31b
font_01_sfnt_off0000f768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF768 10780 bytes
SHA-256: 18eb0a9730e53640d7502c025da925fe0853c188cdc74f1624596b4fa2864ee3

Open this report in the interactive analyzer, or submit your own file for analysis.