Malicious PDF — malware analysis report

Static analysis result for SHA-256 572194c52b54d9c6…

MALICIOUS

PDF

79.4 KB Created: 2021-06-09 09:22:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 99e91464d3b4ef6c87fd8febf0a06a5f SHA-1: a97a0de87f2bdb3674e229761f310402caaf90c8 SHA-256: 572194c52b54d9c6c60c380e42273599b9b371c00b9e624a0b5bb50e868ea91d
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of heuristics related to link farms, disposable hosting, and remote support lures suggests a phishing or social engineering attack. The document body, though heavily obfuscated, contains references to 'cheat stickman war legacy' and application metadata, which, combined with the external URLs, points towards a lure for downloading potentially malicious software or engaging in a remote support scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crysiq.ru/pbw?utm_term=cheat+stickman+war+legacy PDF link annotation
    • https://rabuwamefikulo.weebly.com/uploads/1/3/1/3/131398373/rulepefowerutizobil.pdfIn PDF document text
    • https://mosidaxe.weebly.com/uploads/1/3/4/2/134265431/23b5dfa1ffe86ef.pdfIn PDF document text
    • https://rikidunojig.weebly.com/uploads/1/3/4/4/134488605/wapenugebibawaxakopi.pdfIn PDF document text
    • https://bigogewoxof.weebly.com/uploads/1/3/0/7/130739615/541433c.pdfIn PDF document text
    • https://datuzela.weebly.com/uploads/1/3/4/1/134109276/baxibutunawogusut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415964/normal_6067c0b900902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403816/normal_60452c17e972b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://degomulaxib.pbworks.com/w/file/fetch/144808983/satujupedabipuk.pdfIn PDF document text
    • http://bavudexote.pbworks.com/f/likaberuvupafuriloriwi.pdfIn PDF document text
    • http://lumoxag.pbworks.com/f/bangla_keyboard_ovro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50dfd246-4fd6-408c-ab8a-0de4801ff539/gitezijasotizuzotix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4047d416-c753-45f2-9740-88d1dcacff56/sims_3_64_bit_not_working.pdfIn PDF document text
    • http://palixazoke.pbworks.com/w/file/fetch/144428298/xewenoxideg.pdfIn PDF document text
    • http://fujiserefi.pbworks.com/w/file/fetch/144624933/83151621018.pdfIn PDF document text
    • http://bawamotijeku.pbworks.com/w/file/fetch/144446760/is_bingo_blitz_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a97498-6a1a-4a30-8e94-46d118174b9c/la_casa_de_bernarda_alba_resumen_por_capitulos_rincon_del_vago.pdfIn PDF document text
    • http://palixazoke.pbworks.com/w/file/fetch/144427548/52573897352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87125d85-ec1e-4039-87ad-f96c016b2048/20577675720.pdfIn PDF document text
    • http://dibotoge.pbworks.com/f/lego_star_wars_3_cheats_xbox_360_red_bricks.pdfIn PDF document text
    • http://mumasenekera.pbworks.com/f/what_does_the_triangle_symbol_mean_on_dashboard.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/class_11_business_studies_subhash_dey.pdfIn PDF document text
    • http://mibegenav.pbworks.com/f/safibegiwakilajekobulomov.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011a89.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11A89 16244 bytes
SHA-256: ca7f2d38d644cd97ce86afcb348ccf5d01ebf98274145d6f7e9fd86babcf921d
font_00_sfnt_off0000dd80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD80 5376 bytes
SHA-256: a35e7ad8b898b5e8a4154c4984aab2bfabfb1462dc1a006594e47e5ec8d60b59
font_01_sfnt_off0000efb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB6 13640 bytes
SHA-256: eb7a203ecddd78a13182c1b189d879bf5208455aaae1febd0dfd37fec5b634ee