Malicious PDF — malware analysis report

Static analysis result for SHA-256 77bded62ff482203…

MALICIOUS

PDF

71.3 KB Created: 2021-03-08 00:54:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 3c587831cf1d087ef6123940d62f0f21 SHA-1: ebf8349f1234df891d5a76d3abfa8aae3da37d88 SHA-256: 77bded62ff48220387fe4eb0b4bc0c27689ac492746384363027cd984c28a2a4
126 Risk Score

Malware Insights

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

The PDF document contains a high number of embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting. This strongly suggests a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate an attempt to redirect users to malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/wix?keyword=logitech+usb+microphone+rock+band PDF link annotation
    • https://cdn.sqhk.co/sugefixa/gaKNbdu/vobegux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446147/normal_600f3480be1ad.pdfIn PDF document text
    • http://luminar3-download.xyz/cursed_armor_walkthrough_guide3mxhe.pdfIn PDF document text
    • http://oficialshoes.site/how_many_calories_in_a_large_sonic_milkshake7rvpu.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/elements_of_design_color_picker.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/cidgfgj/idle_air_control_valve_cost_uk.pdfIn PDF document text
    • http://sepukolobu.sportsontheweb.net/how_to_prepare_for_cultural_interview.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383160/normal_5fce032c3eaf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369797/normal_603f16fa82fda.pdfIn PDF document text
    • https://cdn.sqhk.co/xisalaximel/gighidR/safino.pdfIn PDF document text
    • http://nulagumuxim.iblogger.org/51593624939.pdfIn PDF document text
    • http://pikaromabunoteb.iblogger.org/cg_video_songs_hd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://926da24b-d3df-4aea-ac1b-ebdf7359a9e7.filesusr.com/ugd/fef925_66ad0a7cc8df445895793ac0668f33f0.pdf?index=trueIn PDF document text
    • http://zavivemigowoson.epizy.com/romans_chapter_6_questions_and_answers.pdfIn PDF document text
    • https://b84c3727-5d5a-4c5d-9d5d-21cac87b3a69.filesusr.com/ugd/fdd6c2_c4ef5e25ec7543db9e318f426044ee0a.pdf?index=trueIn PDF document text
    • http://futakanawus.onlinewebshop.net/semizunoludobubepana.pdfIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_c4bc9392f2c549daaebe7d9ba93dc575.pdf?index=trueIn PDF document text
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_d67bcc23029e41a0afb31007e4fe8e07.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC402 5600 bytes
SHA-256: 0e1b125863e86f3051c884439b4cb52df13831c3c8a11cb74640a2aa42b495e8
font_01_sfnt_off0000d6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E0 10448 bytes
SHA-256: 1b104f9b55c1c0f36304a2823fb7b546065339f6d25c13c0393ce3cca6e6d961
font_02_sfnt_off0000fad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD7 16204 bytes
SHA-256: 95f2a8319533f051e584a9e2aa38e8d42f7eb419abe795cf0dce2d6390e2c0a0

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