Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a470576b1a7da81…

MALICIOUS

PDF

48.3 KB Created: 2021-06-10 19:31:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7d5b261cd5621f07f85f156d181c6715 SHA-1: 38b79586a11b18e7aa39f4b7f22448e67aa321f8 SHA-256: 8a470576b1a7da811c22d73e943d30a4bb3a3ec8729688c0dac07be9f564c83e
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to malicious redirectors, masquerading as game hacks for Roblox and impersonating Amazon to facilitate credential phishing. The primary lure directs users to `https://netcdn.tw/app/431946152/roblox-i-want-to-break-free-game-hack`, which is associated with known malicious infrastructure. The document's structure and embedded URLs suggest an attempt to exploit user interest in free in-game items or currency to compromise accounts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/roblox-i-want-to-break-free-game-hack.
  • 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 https://netcdn.tw/app/431946152/roblox-i-want-to-break-free-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-cards-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E2 26996 bytes
SHA-256: fb2e631b3192da99a24e0742e7b359347a53c564855d29ed15b218b7c254a7f0
font_01_sfnt_off00008ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC2 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off000098bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98BF 18648 bytes
SHA-256: ffaefb2748a610697fd656506f0c67f76eeb1b2b7267cba30f319827ca98cc3f

Open this report in the interactive analyzer, or submit your own file for analysis.