Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f9be4ae8d466c5…

MALICIOUS

PDF

48.1 KB Created: 2021-06-04 04:51:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d692de2597c78a97818b62e1080ebc89 SHA-1: 5fbcca522f4b22da35072416510257c1aad3b494 SHA-256: d3f9be4ae8d466c5242f5fe12af58fbab205ee5570a2363fb07cbee605d49a06
280 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, including a primary link to a malicious redirector disguised as a "game hack". The document also exhibits characteristics of a "secret recovery" lure, requesting sensitive user information. The presence of embedded URLs and the nature of the lures suggest an attempt to trick users into visiting malicious sites or divulging credentials, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 6

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.online/app/406889139/best-hack-for-coin-master-2021-game-hack In PDF document text
    • http://lib.baruna-husada.ac.id//repository/minecraft-esp_GM479516143.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/robux-fun-hack_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_off0000539a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x539A 25504 bytes
SHA-256: 4aea5844e194f5dcfeca4aa657d1d8dedd6d9d9ba7483ade811a4b7736692c12
font_01_sfnt_off00008edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EDC 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off0000988e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x988E 18496 bytes
SHA-256: 2f7798fbfcbfb5517ad57b524e1a4311bf91dee141c38b7bf712946f2095f69f

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