Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b9a6d3cca8c485c…

MALICIOUS

PDF

74.3 KB Created: 2021-03-11 02:18:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a1ad114a937b23ec39f7d4b126d17c1 SHA-1: b52a94fa08e0881cb4a0759e2da942f6b2a2b257 SHA-256: 7b9a6d3cca8c485c019d3cb2e8586523e9446e7a3a699625c0b473bdffb493b8
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that leads to a domain associated with malicious activity, disguised with keywords related to tax law. No scripts were extracted, but the presence of the malicious URL and the document's deceptive content strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/award?keyword=casu%25C3%25AFstiek+vennootschapsbelasting+pdf
    • https://cdn.sqhk.co/daxutoxod/jghesgh/78782942400.pdf
    • http://trysucre.pro/how_to_set_sentry_safe_combination5i3cb.pdf
    • http://fibisazorowax.mypressonline.com/donevixularosutev.pdf
    • https://fojowixejomad.weebly.com/uploads/1/3/2/6/132681658/50eabd6bd27b6.pdf
    • https://cdn.sqhk.co/gukugifixija/Ch2kheY/nike_air_force_1_white_original_vs_fake.pdf
    • http://najisemure.medianewsonline.com/how_to_clean_my_hotpoint_oven_door.pdf
    • http://koteyarn.moscow/find_missing_money_floridahzoug.pdf
    • https://xaxafojub.weebly.com/uploads/1/3/0/7/130738676/42603ad.pdf
    • https://tulalesin.weebly.com/uploads/1/3/4/8/134876190/rakimixiwisi.pdf
    • http://pubedetavilew.22web.org/mavesikujazinonetul.pdf
    • https://kodidorimo.weebly.com/uploads/1/3/1/3/131380292/4786297.pdf
    • http://wdd13.ru/95135026167367v0.pdf
    • http://forexgeeks.net/jewixomaturifonw0jp.pdf
    • https://vuginavoji.weebly.com/uploads/1/3/0/7/130775358/juxujuwenilolipuroj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://kibagog.onlinewebshop.net/mortal_instruments_city_of_bones_movie_trailer.pdf
    • https://uploads.strikinglycdn.com/files/f5870c7b-d2f3-474c-a36b-482794f13f12/how_to_use_photoshop_cc_2015_for_beginners.pdf
    • http://vobikeretuwof.atwebpages.com/54764888625.pdf
    • https://uploads.strikinglycdn.com/files/c3be0a6e-d3f6-46ff-b78f-6411ad67f4c8/how_can_i_obtain_my_divorce_papers.pdf
    • http://dexegudev.epizy.com/wexijotazi.pdf
    • http://mefinuxewo.epizy.com/calendar_week_numbers.pdf
    • http://lewimidofi.epizy.com/zatapuxifop.pdf
    • http://domirewuzi.epizy.com/aeropex_aftershokz_manual.pdf
    • https://uploads.strikinglycdn.com/files/5f8f1444-27aa-4407-8d44-916bf114c275/what_veggies_can_i_plant_now_in_florida.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d596.bin
09782b7dc65f6cf10d4277396686710255661b283ba763a6757bd886e0f658ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD596 5548 bytes
font_01_sfnt_off0000e882.bin
9eacac6094407f627fe21cc50daf793f14551e4628d890fc2f7bcac361f5eac0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE882 10476 bytes
font_02_sfnt_off00010b83.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B83 4324 bytes

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