Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb8f868a10d490e…

MALICIOUS

PDF

76.8 KB Created: 2021-06-01 05:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d57a349a55e07dfbb1d33f9f8d845a8c SHA-1: 1367b9a8aa45303ae0c4d8c91de150606d24d0c2 SHA-256: 6fb8f868a10d490ebb72e8801c872861b9b26353ecdf5051e93acf9b6d454866
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'nomylo.ru', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to academic text structure, consistent with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nomylo.ru/pbw?utm_term=estructura+inductiva+del+texto+argumentativo
    • https://static.s123-cdn-static.com/uploads/4470537/normal_5fce0ea5b19e4.pdf
    • https://cdn-cms.f-static.net/uploads/4501360/normal_601f13e4304c2.pdf
    • https://static.s123-cdn-static.com/uploads/4376369/normal_5fef3c7813809.pdf
    • https://static.s123-cdn-static.com/uploads/4530171/normal_5ff39dc9baee1.pdf
    • https://static.s123-cdn-static.com/uploads/4454299/normal_5ffd02256ba66.pdf
    • https://static.s123-cdn-static.com/uploads/4450336/normal_5fc76f1733557.pdf
    • https://cdn-cms.f-static.net/uploads/4447263/normal_60481ca22b010.pdf
    • https://static.s123-cdn-static.com/uploads/4491688/normal_6001f04756918.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/767451e5-2e30-46ec-ba8f-574733a4da1a/66918578272.pdf
    • http://wijozuzapusa.pbworks.com/w/file/fetch/144437406/pumatezelodikorozek.pdf
    • http://mudowomuxexo.pbworks.com/w/file/fetch/144422583/how_much_is_a_1995_meowth_pokemon_card_worth.pdf
    • http://mituxap.pbworks.com/w/file/fetch/144423711/reverse_fmea.pdf
    • https://uploads.strikinglycdn.com/files/46490e28-844b-4016-9422-930415465635/bronze_age_mindset_review.pdf
    • https://uploads.strikinglycdn.com/files/d862f56f-f3ad-426c-a9a5-dbacb1c87e89/87913542539.pdf
    • https://uploads.strikinglycdn.com/files/3e5b9c23-e21d-4f9e-b582-d66306a2b143/how_to_charge_tws_i12_airpods.pdf
    • https://uploads.strikinglycdn.com/files/b288875e-f21d-402e-8a13-c721623c03d1/14992317351.pdf
    • https://uploads.strikinglycdn.com/files/052e25a3-19ad-4049-8e8b-2f027a3696d7/how_to_set_temp_on_keurig_elite.pdf
    • https://uploads.strikinglycdn.com/files/6c8f4fd0-8681-400d-ac4b-d7df2b78c43c/why_my_kenmore_dryer_wont_heat.pdf
    • http://xalomuzavege.pbworks.com/w/file/fetch/144431871/19681890206.pdf
    • https://uploads.strikinglycdn.com/files/1f8f7fdb-6dc6-488b-87f6-53be997da51a/csi_the_experience_web_adventures_case_3_answers.pdf
    • http://gufabewa.pbworks.com/f/sukanya_samriddhi_yojana_form_pnb.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebad.bin
9b52a18fd90a3fbcdf6f49d37b42169af03caff812785316f900877286721d8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAD 5344 bytes
font_01_sfnt_off0000fdd0.bin
0802b105406b78102e769e5091b9de1cf559991cce11448e53d3137fc03bb82c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD0 11700 bytes

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