Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5bd64970768d4e9…

MALICIOUS

PDF

72.9 KB Created: 2021-02-11 02:13:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1bed126e88bc1ffe6692acdff7dc84f2 SHA-1: d320cf66dd2e4b9cc6c4f7e132f88cc02fd4e0ad SHA-256: d5bd64970768d4e9d9daad4a568a2c42e27d92384c91a2b0247cd25b3a71678c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting domains, suggesting a link farm or redirection infrastructure for malware distribution or phishing. The document body, though heavily obfuscated, contains text related to an 'event notice board' and 'Tree of Savior', likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=tree+of+savior+event+notice+board PDF link annotation
    • http://bepevekebezupu.22web.org/60767736163.pdfIn PDF document text
    • http://oneitshop.info/jabonofofagigaxewo8qqb7.pdfIn PDF document text
    • http://storefromit.pro/pisadivate5mg6k.pdfIn PDF document text
    • https://cdn.sqhk.co/vosiwuli/hfheVC3/switzerland_flag_image.pdfIn PDF document text
    • http://podarokinsta.site/rafatotafirazikovirituwtjya9.pdfIn PDF document text
    • http://orbitan.fun/niv_study_bible_zondervanp3n19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423428/normal_5ff617bbc06a5.pdfIn PDF document text
    • http://semengergel.ru/20790580507fcyp6.pdfIn PDF document text
    • http://koolmaxt.online/pigudonabd7kb.pdfIn PDF document text
    • http://esclub.pro/blattformate_grer_a06wi1v.pdfIn PDF document text
    • http://pink-echo.club/auto_reply_message_sample_for_supportlfjzh.pdfIn PDF document text
    • http://naturwows.space/pinball_game_windows_for_pc90u5l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407314/normal_601db5af1c95b.pdfIn PDF document text
    • http://shop-onlinediscount.xyz/lilinidenogcrti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zidabisix.epizy.com/converter_mpg_to_mp4.pdfIn PDF document text
    • http://vorafudozef.rf.gd/jkbose_10th_class_date_sheet_private_2019.pdfIn PDF document text
    • http://mapakipoborepuj.epizy.com/41174227421.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CE 4920 bytes
SHA-256: f807026a044750ed862343d10f0f78ea7d9e8511970edf295f03f602e2814902
font_01_sfnt_off0000e395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE395 10740 bytes
SHA-256: ceac0c0bfcec02fed5ee9b3fe6cb66952ae8ca97e19a3e18ae8e1c67eeaf8bb4
font_02_sfnt_off00010849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10849 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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