Malicious PDF — malware analysis report

Static analysis result for SHA-256 a30d91107ca90eae…

MALICIOUS

PDF

37.1 KB Created: 2021-05-21 07:49:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bfe889ac630c09427683f134b0cefd1a SHA-1: b7484991c4f08271fc50dbf8b6be5759ba7a7a41 SHA-256: a30d91107ca90eaeb8f1e1e2f2832c0c146537151aa3a6a8fc4e3c85cd59de70
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that redirect to a 'robux hacks' generator, indicating a scam or phishing attempt. The document body explicitly mentions 'Robux Hacks 2021' and includes a call to action to access a generator. The presence of multiple malicious redirector links and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://netcdn.xyz/app/431946152/robux-hacks-2021-game-hack In PDF document text
    • http://sbm-nn.ru/images/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/pubg-uc-4all-cool_GM1330123889.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003321.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3321 25560 bytes
SHA-256: e7e1da7ba20f236156beb6009462ede320c4afe02946babce7afa8fd5c76f608
font_01_sfnt_off00006e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E89 18648 bytes
SHA-256: 03ab0df94635c5ebeb05191dd2fda9aa410ed650044dc459735f8f7cc99ee4ee

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