Malicious PDF — malware analysis report

Static analysis result for SHA-256 e72ccbf2394c93d4…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 05:35:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d19aaaabe310c5beb3758e046ff6476c SHA-1: bacae30ba53acb5f4b0de4f85c6b405e6c505ac5 SHA-256: e72ccbf2394c93d475170137fe8e5765fa980b367f343616cfda1f0ba663acec
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free Robux and game hacks, which is a common social engineering tactic to trick users into clicking malicious links. The embedded URL http://netcdn.tw/app/431946152/free-robux-codes-2021-game-hack is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

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/free-robux-codes-2021-game-hack In PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/where-to-get-robux_GM431946152.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/can-you-give-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/coin-master-codes_GM406889139.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/free-minecraft-realm-codes_GM479516143.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_off000030ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BA 22784 bytes
SHA-256: 7035304fb55a0d8b525bf5f50f1bd924089c8f93bde45ee8dcd80b848f1ddb2e
font_01_sfnt_off000063d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D2 19292 bytes
SHA-256: a06e109f4742255b3e3bb25118cfd4c6c94882922bdfaa475a115917b157a644

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