Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b879fad59c8837f…

MALICIOUS

PDF

75.2 KB Created: 2021-03-28 11:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 250e671a29e33ce329b6839fa616ed90 SHA-1: 33819d586217fef7b1e0aa99f46c24bb4ca4d046 SHA-256: 1b879fad59c8837f1cfc8bf9a3c06b393b753a1bdfef105154f7a2487166fee1
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that appears to be a lure for downloading an application. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of multiple suspicious URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://pelibifir.ru/123?utm_term=photo+blender+apk+for+android+free
    • https://cdn-cms.f-static.net/uploads/4473023/normal_5fe942f1e7e70.pdf
    • http://bu-markett.com/petitozufelijapasetalezoj9chqq.pdf
    • http://topsalon.xyz/metovemigafuwoxuzus97am.pdf
    • http://5-euro.info/73925284151xd0xf.pdf
    • https://cdn.sqhk.co/bofotabi/nUJOxUK/45003185116.pdf
    • http://merovew.xyz/47548203094cz7oe.pdf
    • http://wowmarket.info/symbolic_matlabc3c9i.pdf
    • https://cdn-cms.f-static.net/uploads/4404959/normal_6009bc3ec520d.pdf
    • https://static.s123-cdn-static.com/uploads/4494139/normal_600238cf1ed8c.pdf
    • https://cdn.sqhk.co/fakolafebu/apHCpgg/vewijerodovij.pdf
    • https://cdn.sqhk.co/jirudumom/Uethhif/extinction_burst_after_sleep_training.pdf
    • https://cdn.sqhk.co/mewuwemiromi/rjDmZjd/86345933862.pdf
    • https://cdn.sqhk.co/pogezasamu/igjMPvL/96463023287.pdf
    • https://cdn.sqhk.co/kikolibub/8BQiNJb/21569541633.pdf
    • https://cdn.sqhk.co/daposofoxig/hgjjjhg/96843575197.pdf
    • https://cdn.sqhk.co/bexuxoxabim/IW7hhgi/60625034230.pdf
    • https://cdn.sqhk.co/nadipozow/ehdqjfk/7_minute_workout_nytimes_2020.pdf
    • http://jewlgems.com/6121459889763tit.pdf
    • https://static.s123-cdn-static.com/uploads/4425227/normal_6003cda91b879.pdf
    • http://snegny.com/66152956071vfb5w.pdf
    • https://cdn-cms.f-static.net/uploads/4417818/normal_604989bf8e5de.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pisedij/vanegilivemu.pdf
    • https://s3.amazonaws.com/tadevewuju/18118569317.pdf
    • https://s3.amazonaws.com/fokapikow/score_sheet_template_for_bowling.pdf
    • https://s3.amazonaws.com/mexavofezoxi/2005_chevy_silverado_3500_service_manual.pdf
    • https://s3.amazonaws.com/minegikukovel/gisapidobosupowexa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7d9.bin
f98f52dc9e7315ae71e6f51dba1a735d5e2933ef7ba690ae34449644e9900d33
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D9 5156 bytes
font_01_sfnt_off0000f953.bin
533eacef71dc956c3b409a0f62abcad12ba551994dd2282eef1ed48cdfc0cdee
pdf-font-stream PDF embedded font (sfnt) at offset 0xF953 11656 bytes