Malicious PDF — malware analysis report

Static analysis result for SHA-256 854d92e03be0a110…

MALICIOUS

PDF

34.8 KB Created: 2021-06-28 19:10:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5e4043141e495c9d315ef8dcf4d219e1 SHA-1: a8aacb433ba94e1ad3513018dc58fa84f36f422d SHA-256: 854d92e03be0a110ea8df628f6a95fa2f5570fc9031f61c36993e78f792d9e5d
160 Risk Score

Malware Insights

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

This PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising free game currency or hacks. The primary lure appears to be related to 'Free Robux' and 'Coin Master' scams. The document's content and embedded URLs strongly suggest a phishing or scamming attempt designed to lead users to potentially harmful sites.

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.co/app/431946152/free-robux-scam-ads-game-hack In PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/toolbox-apk_GM479516143.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/free-minecraft-account-reddit_GM479516143.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/20-robux-free_GM431946152.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/robux-com-free_GM431946152.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/roblox-piano-hacks_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_off00003132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3132 22296 bytes
SHA-256: e5e76e14ddfaf184fdf7371be78f5a0d6b3c613baeb04c52c2543fdac23c1d60
font_01_sfnt_off000062c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C3 19152 bytes
SHA-256: 97bf354eaf7595b62f2ef128edec0768c374ac6026cddaef6a04ba6b8d4c3b7b