Malicious PDF — malware analysis report

Static analysis result for SHA-256 917db71b149ce34d…

MALICIOUS

PDF

69.5 KB Created: 2021-03-21 10:05:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81e1cbd676ad03ac44f3165a094de6c2 SHA-1: 7a91ab68df63befbad93564d66e676c4d252406b SHA-256: 917db71b149ce34dd645c41988214c43cb47607cdf6172a4ab8f84f760eada8b
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is a strong indicator of malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://kuzutuzo.ru/wix?keyword=los+articulos+definidos+e+indefinidos+worksheet
    • http://latuha.com/what_is_a_good_social_studies_fair_topicxfckt.pdf
    • https://cdn.sqhk.co/nidimaru/gfpcugc/amazon_business_strategy_2020.pdf
    • http://proita.space/73662596100n7l91.pdf
    • https://cdn.sqhk.co/temazajilib/iffmyOz/gakevavuxurebek.pdf
    • http://nowanedilado.22web.org/katun_love_video_song.pdf
    • https://cdn.sqhk.co/gogerazina/YhdVNDz/88197834421.pdf
    • https://cdn.sqhk.co/radofufalam/edgiTge/top_10_lists_letterman.pdf
    • https://cdn.sqhk.co/waxobakal/hchjmif/rawopo.pdf
    • http://kolejuf.iblogger.org/risk_management_plan_template_south_australia.pdf
    • http://atlas-copco.su/virgin_radio_italy_frequency1nusb.pdf
    • http://mugedly.xyz/vewuzikegoslzg.pdf
    • http://uaregroup.com/28518666570qaflj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fokapikow/international_finance_corporation_philippines_address.pdf
    • https://200ee3fc-349d-4871-b5c3-2c1c69b60476.filesusr.com/ugd/7b00a0_088ba8d7b2ec415ab753089dec15a6ad.pdf?index=true
    • https://s3.amazonaws.com/kizugokofo/lodash_templatesettings_example.pdf
    • https://s3.amazonaws.com/padanivozeb/android_emulator_localhost_server.pdf
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_b50f6d9882f141448531b6d1ed70bfad.pdf?index=true
    • http://vegiwotunoxatak.rf.gd/how_to_use_round_loom.pdf
    • http://ronumezivarozo.rf.gd/19226852843.pdf
    • https://s3.amazonaws.com/sitozi/zixevuzovozifinopanafupo.pdf
    • https://4ceac43d-3374-4736-8926-b47930641487.filesusr.com/ugd/3b1191_033912fa8280481c9dc0d72bf8653a5d.pdf?index=true
    • https://6a8c3f3f-5248-4e80-80e0-4bf2c04f72bc.filesusr.com/ugd/8b2c09_6b7fb2283afc44fda9c288a38474d8bd.pdf?index=true
    • https://4d8de7df-eaaa-4cdc-85fb-7bbdf9a14b6f.filesusr.com/ugd/6166c9_9712734e7fcc4bc2974315643751d8fa.pdf?index=true
    • 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_off0000cfab.bin
7e7d3b70ffacfcb9217d23ddba119a3f71c857f728f40c01961fd644fff1bedc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAB 5208 bytes
font_01_sfnt_off0000e173.bin
b0b3790d90ad21d7a9a7f28d3104a9ab65e6485e7a56b8e7818c1c9c074cf47f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE173 11100 bytes

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