Malicious PDF — malware analysis report

Static analysis result for SHA-256 b493153779ca0c4d…

MALICIOUS

PDF

43.3 KB Created: 2021-06-10 20:54:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ac2fbd9357a29f448ce75c39c4012cc4 SHA-1: d67503e04b7a235e9d2af5aeb024c1b8a0666c3e SHA-256: b493153779ca0c4d276bcab95e3d40edf9821f45587e9c651ab31cbb60729b0a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' to lure victims. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/free-robux-content-deleted-game-hack In PDF document text
    • https://www.shin.ge/images/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.shin.ge/images/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.shin.ge/images/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • https://www.shin.ge/images/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • https://www.shin.ge/images/roblox-cheat_GM431946152.pdfIn PDF document text
    • https://www.shin.ge/images/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • https://www.shin.ge/images/roblox-pet-simulator-free-vip-servers_GM431946152.pdfIn PDF document text
    • https://www.shin.ge/images/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://www.shin.ge/images/freer-pro-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://www.shin.ge/images/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.shin.ge/images/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • https://www.shin.ge/images/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.shin.ge/images/roblox-how-to-use-cheat-engine-on-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • https://www.shin.ge/images/pubg-hack-uc-20219_GM1330123889.pdfIn PDF document text
    • https://www.shin.ge/images/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://www.shin.ge/images/free-robux-hack-100-working-2021_GM431946152.pdfIn PDF document text
    • https://www.shin.ge/images/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://www.shin.ge/images/free-roblox-level-7-exploiter_GM431946152.pdfIn PDF document text
    • https://www.shin.ge/images/how-to-generate-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://www.shin.ge/images/roblox-hack-download_GM431946152.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
font_00_sfnt_off00004dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DFB 24220 bytes
SHA-256: 67c74cd18d54e8eb0a092be16c09a2606d61f9aa357b1a43ee625b015936f3cf
font_01_sfnt_off000085c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C3 18532 bytes
SHA-256: ae64f8c1997c772a15aa0379624c245ef1b7bc55c5ed9cc061a93cf6a1369218

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