Malicious PDF — malware analysis report

Static analysis result for SHA-256 9174ae8e8f721de4…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 21:35:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 80f6ed60b5934c4cd317392b834f708c SHA-1: 5871b5c5badd1b0e4945e4d4491bf2ab745c8311 SHA-256: 9174ae8e8f721de46104b00e16e01c3355284916398c68b6b2074bf835157fde
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free virtual currency, directing users to external URLs. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier also flagged the PDF as malicious with high confidence. While no scripts were explicitly extracted, the nature of the lures and the external links suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.online/app/431946152/free-robux-android-game-hack PDF link annotation
    • http://lib.mappifhui.org/repository/pokemon-go-free-coins-no-survey_GM1094591345.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-person_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/pubg-uc-load_GM1330123889.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-10k-robux-by-redeem-code-free_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_off00005364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5364 25020 bytes
SHA-256: 72f71e06ea89eea594e8197826a53520950dba1ad332779f9e1e18160b41a6ec
font_01_sfnt_off00008d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2E 18308 bytes
SHA-256: 3d682ae06d788585f0d48ef4471ddbfed33e391fd6a867cb0ce2fb595824b3ec

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