Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c8f324997fe79e…

MALICIOUS

PDF

71.9 KB Created: 2021-03-30 22:19:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f47ade9c08feb2cd69b5db18f097fd58 SHA-1: 50ee378fe7db9939c0b5fec53ed9cb7661e32e3d SHA-256: c2c8f324997fe79e4c670ca70d2e726ca64855c2718a1e972c765e14a849c0f0
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or unknown reputation sites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'ecology packet answers', directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://soxebez.ru/wix?keyword=3.1+what+is+ecology+packet+answers PDF link annotation
    • https://cdn.sqhk.co/biposuba/oieJUoh/extreme_car_driving_simulator.pdfIn PDF document text
    • http://verifybadgesbusiness.com/84877446736d9r8a.pdfIn PDF document text
    • http://healthyforczechrepublic.site/sabodenepitodhdeld.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498702/normal_6013253716986.pdfIn PDF document text
    • http://secureappeal.com/neurolinguistisches_programmieren_definition17w21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426277/normal_604386abb345c.pdfIn PDF document text
    • https://cdn.sqhk.co/mudonisogub/ajj0Cif/17629641335.pdfIn PDF document text
    • https://cdn.sqhk.co/xubewarow/WhaijSC/all_sniper_games_for_ps4.pdfIn PDF document text
    • http://car-den.ru/tejumedabiwixemitofexhog1c.pdfIn PDF document text
    • http://vk-settings-change.online/pusemaxinibuziraa0te5.pdfIn PDF document text
    • https://cdn.sqhk.co/jofijoju/eCgfnSm/simolosulaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483072/normal_5fef84cda31c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411931/normal_605d50e2c75c2.pdfIn PDF document text
    • http://kivimuxalusis.22web.org/71853311209.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pidexofeg.epizy.com/which_sentence_is_an_example_of_a_objective_statement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a75b4b79-37df-4f82-8b62-8e109e3b75ce/339427067.pdfIn PDF document text
    • http://rubabup.epizy.com/rigikuropazozasezoxefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe2c8e6-8f90-4508-aef8-e203cc4393ec/kawowufamagik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b9d761e-d882-48f6-b30e-360a23b67488/how_to_revive_a_18_volt_black_and_decker_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be2fd5b-9a13-4d0c-a1fc-579bd7c124a3/fekawipunowafokubopanaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d2d028b-626b-4d23-ba42-0139fbcefb11/kofur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cd95513-5be4-4226-8de5-1dbd537ad961/piwuni.pdfIn PDF document text
    • http://navebulaj.epizy.com/netbeans_jdk_windows_7.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD849 5604 bytes
SHA-256: a6cca436b4161af5da568cb8f309c21ea8c3502cd2c6f2724be80e3f0c9ea5b3
font_01_sfnt_off0000eb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7F 12096 bytes
SHA-256: 3c154e69cb82fe3b196c86b5f211391797e519eaecafeb0fb43bdcd5dd936e15

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