Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f204bd4e9c6cc50…

MALICIOUS

PDF

34.8 KB Created: 2021-07-08 07:43:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 00b5d2a3b101fbdb846945e6eab4a3a2 SHA-1: 0fd94a05e01ef566611bec85e3b9229ca539a2de SHA-256: 7f204bd4e9c6cc5083af2892e19662c09fa4690d3a8a26f92036918fe6b04c74
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a game hack lure, linking to known malicious redirector infrastructure. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting the malicious site. While no scripts were extracted, the PDF structure and embedded links strongly suggest a phishing or scam 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/406889139/coin-master-free-spins-and-coins-generator-game-hack In PDF document text
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/10-ways-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/hacks-in-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/pinkant-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-hacking-on-ipad_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/how-to-hack-your-self-getting-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/roblox-surf-hacks_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/roblox-build-a-boat-hack-script_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/how-do-you-hack-and-make-yourself-bigger-on-robloxs_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/pokemon-go-free-3d_GM1094591345.pdfIn PDF document text
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/free-headless-head-roblox_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
stream_002_off0000325d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x325D 22620 bytes
SHA-256: f573287f66d2c38f6800c9d2a6dad07025cf6213ad5f4471eaf1a0639ea0f7fe
font_01_sfnt_off000064f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F7 18348 bytes
SHA-256: 9c081de5538a8283035441b803fca250df6ca28883337f185a1ed3947eadce4e

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