Malicious PDF — malware analysis report

Static analysis result for SHA-256 36208d1b0c1ba0b9…

MALICIOUS

PDF

82.8 KB Created: 2021-03-18 19:58:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8786ae66bda2234a02948968ee154d87 SHA-1: 19df6a02df0925ae282879b77f9e9e7a524ed644 SHA-256: 36208d1b0c1ba0b928002b703851c45239e04032cf267f8c596e36aa436b2a89
126 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 phishing or malware distribution attempt. The PDF contains numerous embedded links, with a notable external URI pointing to 'https://resalured.ru/wix?keyword=blap+precision+metals'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a link farm on disposable hosting, reinforcing the malicious intent. No scripts were extracted, but the presence of multiple external links suggests the document's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/wix?keyword=blap+precision+metals PDF link annotation
    • http://mevukavotidu.getenjoyment.net/kezaxafi.pdfIn PDF document text
    • https://cdn.sqhk.co/nubavojek/aL5CAhc/wumenokixikaj.pdfIn PDF document text
    • https://cdn.sqhk.co/jenotonolo/jgQidjj/super_solano_hair_dryer_3500_lite.pdfIn PDF document text
    • http://ladirojenovezoj.mygamesonline.org/inorganic_fertilizers.pdfIn PDF document text
    • https://cdn.sqhk.co/wujutasowowi/LiKjfgf/monster_raid_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/Uheijjf/vugabal.pdfIn PDF document text
    • http://nalatakojuzali.iblogger.org/78494092141.pdfIn PDF document text
    • http://nutosuvitiraj.scienceontheweb.net/bankruptcy_act_of_1933.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://mudikavorutemu.epizy.com/65858734361.pdfIn PDF document text
    • http://fataragoreb.myartsonline.com/fulebozafuxuzejevomopip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d62bbed-5435-4ff9-9277-a5a345186b53/franny_and_zooey_book_cover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f360ba-07a8-4372-ace8-60cff3b9eb4e/how_do_you_tigers_protect_themselves.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d19719bf-c9b7-40a3-abbe-827907095939/tepelimemirifawaluw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e39ea7a-d41f-48c7-9fc9-9a676d296233/how_to_do_istikhara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd208435-78fb-46fe-bd4b-eda193408668/service_manual_hp_designjet_500_italiano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21114dad-da88-4a41-89b6-e03ae95cd8a4/ronanoso.pdfIn PDF document text
    • http://nusilemil.epizy.com/how_many_calories_in_a_wendys_small_chilli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d814f753-7efc-4cbb-8e10-96bf0d900495/verexegezonijazajelewar.pdfIn PDF document text
    • http://tumanababaxa.epizy.com/61341229690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90526b29-a0c3-4669-beb5-c7d606ed21e8/dell_vostro_1500_drivers_for_windows_10.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_off0000e525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE525 4916 bytes
SHA-256: 19ee3bdc8b6a6505c7210c99ad5e9ad9750a358190cb6985d6bf6a03ed3a0704
font_01_sfnt_off0000f5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AA 10768 bytes
SHA-256: 6d3f3084bdb0cdcd55112b4505e9408351f0f725adf9b21e029692f09a8599b5
font_02_sfnt_off00011ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB1 16076 bytes
SHA-256: fce21d86c2b5faa43a5619d6c859002d414ef8720c10ef6ba746f045f1b0bfa7
font_03_sfnt_off00012f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34