Malicious PDF — malware analysis report

Static analysis result for SHA-256 d084d11e1e38eaca…

MALICIOUS

PDF

78.9 KB Created: 2021-03-09 15:48:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bada7b31769471b4827940d22e15d0c2 SHA-1: d1e2289b5eb7a69a74d8b99a3bbc29ed07060aaa SHA-256: d084d11e1e38eaca80a9358a550b3eb23f4f116e238905fe3a39491c7025f07d
126 Risk Score

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, many of which point to disposable domains and are likely used to redirect users to malicious content or phishing pages. The document body, though heavily obfuscated, contains text related to 'Agoda company information' and 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The presence of many external URIs and the link farm heuristic indicate a strong intent to redirect users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://golowaki.ru/123?utm_term=agoda+company+information
    • http://workmonster.net/bupropion_dosage_formszr8wn.pdf
    • http://iranianvc.com/vitosemenhou.pdf
    • http://boothattendant.com/illinois_reg_1bh2h6.pdf
    • http://ulekschool.online/navy_blue_gold_and_white_balloon_garlandlrno8.pdf
    • http://freefire-gifts.com/21762984491ygsnj.pdf
    • http://imm-shoes2.club/82481934654amgti.pdf
    • https://static.s123-cdn-static.com/uploads/4460231/normal_60053b9ad37a8.pdf
    • http://fakts.design/stickman_hook_pcvzr1b.pdf
    • http://opssmall.space/6214966864002pde.pdf
    • https://cdn-cms.f-static.net/uploads/4381737/normal_6018e70c75cc8.pdf
    • http://rajedat.iblogger.org/accounts_format_for_charities.pdf
    • http://italia-doc.fun/47461617016glqcw.pdf
    • https://cdn-cms.f-static.net/uploads/4487399/normal_60469d9196ab7.pdf
    • http://oneshops.space/land_guideline_value_in_velacherydovcq.pdf
    • http://hotita.space/tecumseh_engine_parts_amazonret5q.pdf
    • https://static.s123-cdn-static.com/uploads/4473637/normal_5fce5c90c192a.pdf
    • http://gratoraama.space/jirolenabetolamipamtu4de.pdf
    • http://deutschebank-meine.com/lunokevarudekutumunel4lu0n.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gazolisusebo.epizy.com/samsung_bn59_tv_apps.pdf
    • https://uploads.strikinglycdn.com/files/4e9e0a89-2f2c-415c-8fa1-8a1000ad634e/74468332653.pdf
    • http://fizetoxeloxiti.rf.gd/tabla_de_valores_de_las_funciones_trigonometricas.pdf
    • https://uploads.strikinglycdn.com/files/7cb3f809-215c-4c8f-8e81-8e811c3951d8/cuales_son_los_titulos_de_credito_privados.pdf
    • https://uploads.strikinglycdn.com/files/a97fc638-0069-4711-a908-79d2a53b1d8c/10777404283.pdf
    • https://uploads.strikinglycdn.com/files/6e299ebb-d4bd-40b3-b8fd-23a112db0bb5/apc_smart_ups_x_1500_battery_replacement.pdf
    • http://bimejevitugera.epizy.com/69472233286.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c6.bin
f71fdf72dbf9a3f9f019ffa0dd0271a7592a54dd61963e8d312ff4a44c2167ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C6 5356 bytes
font_01_sfnt_off000108fe.bin
482e0e36b0afa93bd9dfe751d86ca59145bd24dad9a31ebf35564601d4f1a759		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108FE 10816 bytes

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