Malicious PDF — malware analysis report

Static analysis result for SHA-256 50fdcc3ec7d0a7e0…

MALICIOUS

PDF

33.2 KB Created: 2021-07-04 22:47:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 20ad3dcb47cbfe62df26a29edfb95d23 SHA-1: 74c8347b96f96788706ff5d202dc4569a081fdc6 SHA-256: 50fdcc3ec7d0a7e039fd60b15f6194675156fc3266ff238e4a290bf57e1bd198
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, designed to lure users into clicking on offers for game hacks and generators. The primary malicious link, http://netcdn.tw/app/479516143/free-minecraft-coins-game-hack, is associated with known malicious infrastructure. The document body and heuristics indicate a social engineering tactic to drive traffic to potentially harmful websites.

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/479516143/free-minecraft-coins-game-hack In PDF document text
    • http://library.smpn2-byl.sch.id//repository/pubg-uc-kuwait_GM1330123889.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/robux-sites_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/pokemon-go-best-free-outfits_GM1094591345.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/how-to-get-10-000-free-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/roblox-free-bir_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/free-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/free-servers-for-roblox-super-power-traing-simulator_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/free-robux-cards-that-havent-been-used-yet_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-mobile_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_off00002f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F77 22420 bytes
SHA-256: 6d5357ccbc13215fdd3b4e52d95372143cbc6120614a673ee30d7f5b2f9540d9
font_01_sfnt_off0000601c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601C 17996 bytes
SHA-256: 62b33825d77a1aa8942f78c87daf4acfd1b4f6aff03710f3f9c2eec2f3f5493c

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