Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a75c935411a5dad…

MALICIOUS

PDF

42.4 KB Created: 2021-05-11 08:44:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 401e37b10fbd68046d40d6a846dc4e33 SHA-1: c0bb228a384974ec4277bf457a781329ed7b6bf1 SHA-256: 9a75c935411a5dad8c56d5e8f8d00a74e00c23ae848c51b161d87618ca45011a
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links to external websites, including a known malicious redirector, that promote game hacks and generators. It also includes a visual download button lure and instructs the user to install a browser extension or update. These elements strongly suggest a social engineering attack aimed at tricking users into downloading potentially malicious software or visiting scam sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/406889139/coin-master-hack-pc-download-game-hack In PDF document text
    • https://www.les-sp.org/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • https://www.les-sp.org/images/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/coin-master-download_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://www.les-sp.org/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/twitter-coin-master-free-spins_GM406889139.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
stream_003_off00004a5f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A5F 25340 bytes
SHA-256: 5d6f319208122b5b0810e351e641b87cdbf154c36f5e8b3d44a54f156c4cf47e
font_01_sfnt_off000082ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82FF 18448 bytes
SHA-256: 1a77b19ae755b2674c1484136c2a6f206883130a3eb8aa78e1aa84be95f9bf15

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