Malicious PDF — malware analysis report

Static analysis result for SHA-256 c86c84bc7f5e1436…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 17:42:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 1287b0c658b8c5b9de1411a2cd5dea32 SHA-1: 48ce89b189ffaec2478af7a51c76a41b92441661 SHA-256: c86c84bc7f5e1436e7886edb35b4eeb8d5106f5ce0db09959f1484ec796686a4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one pointing to a known malicious redirector infrastructure, designed to lure users into downloading potentially unwanted or malicious content related to game hacks. The document body and embedded URLs suggest a scam or phishing attempt related to popular games and applications. No scripts were extracted, but the presence of malicious redirectors and the lure content strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/roblox-hacks-2021-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/pubg-uc-4all-cool_GM1330123889.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-cheat-in-rotom-on-prokect-pokemon-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-images_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/tiktok-free-install_GM835599320.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/pc-robux-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000306e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306E 22440 bytes
SHA-256: f2ffa044f71c6b81f20ae6c8bf3ef8a876ed36d62979124d48f6a08c8113e5af
font_01_sfnt_off00006242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6242 19056 bytes
SHA-256: a827687bde1c23907f75db23928d8c544c1849638492c2c48bf6e5fa6ea38882

Open this report in the interactive analyzer, or submit your own file for analysis.