Malicious PDF — malware analysis report

Static analysis result for SHA-256 53225963e666604f…

MALICIOUS

PDF

79.9 KB Created: 2021-02-18 05:27:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 32c6885703891dfcda9481a1ab725ff5 SHA-1: e86f18d495821a8d8ed91449aa2dd02126ccaba8 SHA-256: 53225963e666604f833d8700c1ade309e61bde42c395d2b9dcc4dfe4818afee2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, suggesting it is part of a link farm designed to attract traffic or distribute malicious content. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs users to copy and paste content into a shell, a common tactic for executing malicious commands. The presence of multiple external URLs and the ML classifier's high confidence score support the assessment of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://jottigo.ru/aws?utm_term=microsoft+visual+studio+2010+express+license+agreement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427793/normal_6009d19339582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388169/normal_600da1888db02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408319/normal_5ff288fe21337.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480884/normal_5fe6bb40d7c3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461791/normal_5fee82a17fd2b.pdfIn PDF document text
    • https://cdn.sqhk.co/waketeni/flmcKl7/drive_games_hill_climb_racing_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421630/normal_601b1498d69e8.pdfIn PDF document text
    • https://jitojadafolad.weebly.com/uploads/1/3/4/4/134404030/52dda352b3b.pdfIn PDF document text
    • https://nogalagamepet.weebly.com/uploads/1/3/0/7/130738620/nagumideja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451756/normal_602be067b9517.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366388/normal_5ffb145e47dd1.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/ihqDdge/storm_wars_ccg_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xidosisew/dErgiig/mindustry_mods_github.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugisaxap/idgehaD/heart_surgery_programme_bbc.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/giiifhb/56936929826.pdfIn PDF document text
    • https://tumokisomagen.weebly.com/uploads/1/3/4/8/134897409/af9bf253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425506/normal_602237694522c.pdfIn PDF document text
    • https://cdn.sqhk.co/zazavoxujub/5jcUXkJ/space_shuttle_boosters.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF849 5932 bytes
SHA-256: 3b4501017bc31568e55e8a919095b158a30d2b41c0db47117e047b0c7b687197
font_01_sfnt_off00010c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C89 10984 bytes
SHA-256: a585c2a336366352908753ad3bd7d035827343d29463e5484afed93e34c968fd

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