Malicious PDF — malware analysis report

Static analysis result for SHA-256 67dcad8de8a4dc9e…

MALICIOUS

PDF

84.0 KB Created: 2021-03-22 09:30:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 3b39fefebd2fb9cd051d510fa9910d4f SHA-1: e3e2e5899255f26c01416bf8bbdacd2c0fd357ad SHA-256: 67dcad8de8a4dc9eb104f8f5dcf21faffda3a8ea8d95799a05c0d8755137f7fe
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/123?utm_term=chavanprash+song++2018 PDF link annotation
    • https://buwofujidesad.weebly.com/uploads/1/3/4/5/134521037/dugaretexepoxe-bowanijolonebu.pdfIn PDF document text
    • http://metiwizonud.getenjoyment.net/fur_elise_guitar_tab_easy.pdfIn PDF document text
    • https://lurusavi.weebly.com/uploads/1/3/2/7/132710630/a0e80a53b.pdfIn PDF document text
    • http://nukapag.getenjoyment.net/33907843545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412570/normal_5fd2d8f379b61.pdfIn PDF document text
    • http://choosenews.space/preschool_books_about_life_lessonstul5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5fd134f695464.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370777/normal_5fdf96d87e7bc.pdfIn PDF document text
    • https://dunevija.weebly.com/uploads/1/3/4/3/134306837/30a2b9be244.pdfIn PDF document text
    • http://pink-echo.club/childrens_hunter_welly_socks_size_guidef57j5.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/gigdja3/xuziriviwenarurumovep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470977/normal_6035fae78a1e7.pdfIn PDF document text
    • https://kekufakaxuw.weebly.com/uploads/1/3/2/7/132740700/sunevinejavozo.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/hho7FnD/reversi_vs_online_multiplayer_othello_board_game.pdfIn PDF document text
    • https://zimazegikej.weebly.com/uploads/1/3/4/7/134732290/09b30.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupesiparu/jevI8gc/stickman_battlefields_hack_apk_download.pdfIn PDF document text
    • http://presentinsta.site/geo_bookmark_apps92yjm.pdfIn PDF document text
    • https://cdn.sqhk.co/venifirub/fGhfiaU/sort_balls_3d_free_puzzle_games.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/neverending_story_easy_lyrics_skz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://geforagegi.atwebpages.com/lenovo_g50-80_i3_price_philippines.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84A 5536 bytes
SHA-256: 91c25ff8e6819fd99442d7c6cd0386810c2a8f710cd4ae4fe6ff8f2176469c36
font_01_sfnt_off0000fb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB14 2280 bytes
SHA-256: 74d4c5f2ba0b268266ee4fec05e42973c887f86c13404ecc52f6efe1169d1e05
font_02_sfnt_off0001059f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059F 11408 bytes
SHA-256: a046c33c81865fdb2a25d128c33f561daa4f67e57bb8c21fbcc9292ce81879b8
font_03_sfnt_off00012ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE4 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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