Malicious PDF — malware analysis report

Static analysis result for SHA-256 3352555f6977651b…

MALICIOUS

PDF

44.2 KB Created: 2021-05-22 08:08:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1f749904c94033091051a087204bfd2b SHA-1: d390e1a351cd5a40df4eb28850cb27a68abaec7c SHA-256: 3352555f6977651b92fac5d7b5ab91a46430a3e8b3a0362be0a4cb81e1967b83
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external resources, including a primary link identified as a malicious redirector. The document body and heuristics indicate a lure for 'free Robux' or 'game hacks', suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an intent to redirect the user to malicious infrastructure for further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7481

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/free-100-robux-game-hack In PDF document text
    • http://elearnfactory.com/images/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://elearnfactory.com/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://elearnfactory.com/images/roblox-but_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/free-spins-coin-master-2021-today_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000342a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x342A 25900 bytes
SHA-256: 2e9280ae83178efbd68e9b7fd7e9dfe22e588ca6e7a0ba43853aae22dd292a27
font_01_sfnt_off00006f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F30 8760 bytes
SHA-256: 43a8214fa70ea998e7c3961af60ddcd215b98fab7506b80842a49298d5b81151
font_02_sfnt_off00008bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC3 18292 bytes
SHA-256: ade71c57547996cc2793a44f7be3e933a3a5664d4c8f362da863e6c031d51f12

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