Malicious PDF — malware analysis report

Static analysis result for SHA-256 25c51c170b6c4ee2…

MALICIOUS

PDF

80.6 KB Created: 2021-03-24 14:13:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c413f995392d0e1d755b6a41c6889069 SHA-1: 76c45947039cf1a4e17977fcb4ebd545e0370dc9 SHA-256: 25c51c170b6c4ee2baff486e2413db4430dbbbbcf89226411aa9ddaf90b1211c
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a fake CAPTCHA heuristic suggests a social engineering tactic to trick users into interacting with the document. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://resalured.ru/strik?utm_term=netgear+wnr1000+change+admin+password
    • https://cdn-cms.f-static.net/uploads/4444622/normal_60144c14843fb.pdf
    • https://mowavowami.weebly.com/uploads/1/3/4/5/134591552/zixirosu_nusafafomexi_zanakujimawej_romixuluxutod.pdf
    • https://cdn-cms.f-static.net/uploads/4484818/normal_60518567a0685.pdf
    • https://buxipowuno.weebly.com/uploads/1/3/4/3/134353207/2386871.pdf
    • http://dikagowoxi.sportsontheweb.net/nepewotigolamosakixab.pdf
    • https://cdn.sqhk.co/gijosevozu/cEtydiY/1841473982.pdf
    • https://turonobofudub.weebly.com/uploads/1/3/4/4/134463989/6796c093.pdf
    • https://cdn.sqhk.co/tapuvimixaxo/awzhhgj/69655065086.pdf
    • https://cdn-cms.f-static.net/uploads/4420604/normal_6015da1670420.pdf
    • http://xujaxul.mywebcommunity.org/bollywood_movies_list_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4409819/normal_602f7ad5d76eb.pdf
    • https://cdn-cms.f-static.net/uploads/4373768/normal_5fe6e77089331.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://susijul.rf.gd/alphabet_franais_arabe.pdf
    • https://uploads.strikinglycdn.com/files/93288994-98e7-44da-a252-b3a5573a3fbb/how_to_play_football_for_beginners_book.pdf
    • http://babivukir.epizy.com/70986280752.pdf
    • http://xelidev.rf.gd/41077436640.pdf
    • http://xikusaduxofi.atwebpages.com/56608492293.pdf
    • https://uploads.strikinglycdn.com/files/dc6b525e-0c20-440a-b99b-ccbfa5b68a78/46483580352.pdf
    • https://uploads.strikinglycdn.com/files/49dafb1b-edd9-4ec0-bf6f-ecb53ddf9e93/51845264769.pdf
    • http://kofadoz.rf.gd/xamojabemu.pdf
    • https://uploads.strikinglycdn.com/files/bef5995e-8288-41d3-acc9-1f08617beacc/neato_botvac_cleaning.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_off0000ef66.bin
58f41f4ee4a5ffa1bb417f85716c2070ce52af20acd136a3246dd8ea4f465420		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF66 5500 bytes
font_01_sfnt_off000101fb.bin
e7cb1ee14140c7301fc82d39ca9bf798932a730b49de0ddd6c1766fff8bd91b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101FB 10788 bytes
font_02_sfnt_off0001268b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1268B 4324 bytes

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