Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a5ef2d7938d69a…

MALICIOUS

PDF

41.6 KB Created: 2021-05-11 02:03:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 68993d5bf77bd36ea43ca7f137e5f8c5 SHA-1: 4927d45df091f326f0403fd077b051d425b9a0e1 SHA-256: 14a5ef2d7938d69ac0e45426bb71e6f8175ef939b6e53b3c1afa2ce68e394a22
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to redirect users to websites offering game hacks and free currency, indicative of a phishing or scam lure. The document body and embedded link structures strongly suggest a malicious intent to drive traffic to potentially harmful sites. While no scripts were explicitly extracted, the PDF's structure and embedded links are sufficient to infer a malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.xyz/app/431946152/roblox-generator-game-hack In PDF document text
    • http://reggieslockandkey.com/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-hack-root_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-deals_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spin-link-today-download_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-no-human-verification-or-survey-or-download-2021_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
stream_003_off0000490b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x490B 24272 bytes
SHA-256: 574952a1e821849c736c7922b99a7f4d776116a1ee14e11ae844c95d02a0d22c
font_01_sfnt_off0000807c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x807C 18116 bytes
SHA-256: 124341eb3a4a3b8bc1f076925fa8461137298bb957754babdcbe9c7592fcce55

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