Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7f967255ecd0b7e…

MALICIOUS

PDF

34.0 KB Created: 2021-07-07 05:36:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1d0dbd14fccd2cd2b31f97b39d4bc154 SHA-1: ef97beed26c4e557ceaf5218147fae633854dcce SHA-256: e7f967255ecd0b7ee3250210488674bf84409186676f5163b48e76eec17b3789
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it links to malicious redirector infrastructure, specifically promoting a 'free generator / game hack' lure. The embedded URL http://netcdn.tw/app/431946152/robux-earner-game-hack is identified as malicious. While no scripts were extracted, the document's structure and embedded URLs strongly suggest a phishing or scam attempt to redirect users to potentially harmful sites.

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/robux-earner-game-hack In PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/free-robux-no-verification-generator_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/free-bobux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/inject-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/roblox-lego-hacks_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/hack-roblox-game-tower-battle_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-easy_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/free-robux-videos_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/get-free-spins-on-coin-master_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
font_00_sfnt_off00002eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB6 22516 bytes
SHA-256: 2db98316372748997d687cf072e814a23cff070d9ab451084230a5ab41a6e289
font_01_sfnt_off0000612b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612B 18552 bytes
SHA-256: 0606e8ee5c67fe2ec8d9d614024794f335540379fd39c73375d01152fb4400e4

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