Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc4609fa5567691…

MALICIOUS

PDF

86.1 KB Created: 2021-03-25 12:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: bd6220c51b114d4e5a0f30c8408430ca SHA-1: 5a5efb8a8adcd5b0793787e71451c450e4424c39 SHA-256: 0bc4609fa5567691c59a8d389adc2a56965d7f287bf35279f7753c86311b714b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to technical manuals, aiming to trick users into clicking malicious links.

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://nipisod.ru/award?keyword=abaqus+theory+manual+6.+13+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470685/normal_603a486d5cc64.pdfIn PDF document text
    • https://cdn.sqhk.co/vapumojemov/pidxYEH/pumonidabugudetozi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527345/normal_5ff35d0d396d6.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/Gggjvjg/39212160332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470205/normal_604990184c217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405459/normal_602e80a2c8198.pdfIn PDF document text
    • http://ductsunlimitedins.com/apostrophe_worksheets_middle_schooldak2r.pdfIn PDF document text
    • http://legalvictory.group/49956829166nsbhv.pdfIn PDF document text
    • https://turabebusaweni.weebly.com/uploads/1/3/1/4/131438207/fisowip.pdfIn PDF document text
    • https://bevabuje.weebly.com/uploads/1/3/4/8/134897483/zipaxoti.pdfIn PDF document text
    • http://zasolorozeruged.22web.org/malayala_manorama_calendar_march_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb5b1c74-4a2f-44af-a7c7-00841b35370d/mushoku_tensei_anime_schedule.pdfIn PDF document text
    • http://nalobilemuzun.epizy.com/92949008550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7f6c36c-0bc4-461b-8981-7644f47a984c/81533249479.pdfIn PDF document text
    • http://pusolegulijased.rf.gd/combo_guide_little_alchemy_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6cae86d-e5b4-4761-8b01-a90df0f102ca/ho2s_heater_control_circuit_low_bank_1_sensor_1.pdfIn PDF document text
    • http://wavedada.epizy.com/arteriovenous_malformation_and_hemangioma.pdfIn PDF document text
    • http://rikovinob.epizy.com/rn_med_surg_certification_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2a0c90a-1b4e-4eaa-a456-1de951222e20/richmond_power_vent_water_heater_installation_instructions.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF546 8444 bytes
SHA-256: 875b390529e79d25f9934ede2e33096c8256342bf2d3ba027e21260f17aa4199
font_01_sfnt_off00011143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11143 6040 bytes
SHA-256: 801e214a36c0ea1cb9e1b7ca5287d693ad8f15be58d03e471670167cd724f541
font_02_sfnt_off000125b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B3 10908 bytes
SHA-256: 05cee5ed81a3e8ad233d2909ffdfdb0b2ca3c2d55884d31c89e01c240f659d37

Open this report in the interactive analyzer, or submit your own file for analysis.