Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d243994195ac691…

MALICIOUS

PDF

79.5 KB Created: 2021-03-27 11:16:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f5a1613c35168596332ca4dd05a0c0bb SHA-1: 652e067b06a2229a580e26915904676a7e963df5 SHA-256: 8d243994195ac691befdf2e0e05802d7bfb79d03ea954865478e4b76d93f825f
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The embedded URLs likely serve as lures to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=les+blagues+de+toto+tome+1+pdf PDF link annotation
    • https://sukutunog.weebly.com/uploads/1/3/5/3/135304197/neriko-kanovemeda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382420/normal_60183a7de4bbf.pdfIn PDF document text
    • http://getepitisux.mywebcommunity.org/bankers_adda_current_affairs_2020_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455645/normal_5ff8c6693b496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408599/normal_6040e35c593b9.pdfIn PDF document text
    • https://cdn.sqhk.co/jasorevujoxu/4Hqicji/nelenajofuriwoxibegonored.pdfIn PDF document text
    • https://xejulanuvupif.weebly.com/uploads/1/3/2/7/132740270/woduk_galefojoveme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374700/normal_605910e0e9698.pdfIn PDF document text
    • https://cdn.sqhk.co/mupijuwo/egjUjiU/bunny_bubble_shooter_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490724/normal_5ff8f1cfcdf70.pdfIn PDF document text
    • https://bawimivumo.weebly.com/uploads/1/3/4/6/134609907/fimepoxefa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476010/normal_60049d39f04d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465402/normal_5ffe88a7c07ca.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/vagawuzuduroras_kinudajexinizel_puwokunebun_sivozisi.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/dii8j3I/best_rechargeable_dab_radio_for_bathroom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_605c290bc25b7.pdfIn PDF document text
    • https://cdn.sqhk.co/jitegoji/jciLhce/kodiak_alaska_weather_in_june.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446489/normal_602d52f45fa04.pdfIn PDF document text
    • http://mibilivo.scienceontheweb.net/goxiguzezowototoporif.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/ghdRjfy/fleet_battle_2_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373987/normal_5fee2a0ede6af.pdfIn PDF document text
    • http://vivubowi.getenjoyment.net/codices_aztecas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418401/normal_6035776327d61.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://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_off0000d478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD478 5124 bytes
SHA-256: 3477b88ff6b175d8fdae1f17f547c9958435d62616e8c44ccec94ae32ea26617
font_01_sfnt_off0000e5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F9 12048 bytes
SHA-256: 5ebabdcaac69e32298fe882cd8e5ce07bb8a64e82b9fae2446960bb04a253948
font_02_sfnt_off00010cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF0 16108 bytes
SHA-256: aed46c9af23f208f135cb03afacfd1ac790ba89857c5134c11dc43e7260cc7d5
font_03_sfnt_off0001219b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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