Malicious PDF — malware analysis report

Static analysis result for SHA-256 83d949f3deae9f3a…

MALICIOUS

PDF

34.4 KB Created: 2021-06-19 18:37:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 815ac0c3fbf303d51b8c7dba6b4ff169 SHA-1: 73cea2fbfaac8806c831333ceef7ecf6b12c8cfc SHA-256: 83d949f3deae9f3a6810bc17786a3f688d6c4b66b0af25aaab05d94f42fbe266
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free game currency and hacks, directing users to a known malicious redirector. The document body and embedded URLs strongly suggest a phishing or scam attempt to lure users to malicious sites. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, and the heuristic firings indicate malicious redirection and lure tactics.

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.co/app/431946152/how-to-earn-a-ton-of-robux-for-free-game-hack In PDF document text
    • https://vierabyragazze.com/upload/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/cm-spin-link_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox40com-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-redeem-card-codes-2021-free-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EBD 22744 bytes
SHA-256: 29e924e289cbaf32b1c56d0106555210d81e3f9289af0c91ed92796a40772b65
font_01_sfnt_off000061db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DB 18880 bytes
SHA-256: 06217ed0ff1479873e1678e6dff1dd521aff6480c58883535654adf496b305d0

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