Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2c64ef3e81d5168…

MALICIOUS

PDF

36.0 KB Created: 2021-07-06 03:07:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ec12914965784ab1dcdc991d3abbd7c4 SHA-1: 474ff50aa25617c4f466aa26dd0a78eebf32579c SHA-256: d2c64ef3e81d5168dbd557b98730cc7574ae88b5c1541bd951fa676859f37ba2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free in-game currency, specifically mentioning 'Robux' and 'Coin Master', and includes a critical heuristic firing for a malicious redirector link. The primary URL identified, http://netcdn.tw/app/431946152/how-to-get-free-robux-without-downloading-apps-game-hack, is directly associated with this lure. While no scripts were explicitly extracted, the nature of the lure and the redirector strongly suggest a phishing or scam attempt, likely leading to further malicious activity.

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/how-to-get-free-robux-without-downloading-apps-game-hack In PDF document text
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/coin-master-ad_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/robux-free-online_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/free-robux-generator-no-survey-no-download-no-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/noob-vs-pro-vs-hacker-vs-god-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/esp-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/how-to-get-infinite-robux_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_off000033b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B0 22064 bytes
SHA-256: a18217bf4210d50565374608bfbc48d51bf74868fff52c5b1cd7c253e4a8fac2
font_01_sfnt_off0000649f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649F 20060 bytes
SHA-256: 44f0105255c4bb73f6c79bc6e5489dacf7eb081798d72a7dddb9830b56c75d42

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