Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f4cbee229a35d5c…

MALICIOUS

PDF

42.6 KB Created: 2021-05-12 07:30:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1e6c3d0622219a24fa9763a5755d7789 SHA-1: 6c1ac1ee07184b583d4627a9a3d6af6be36e6b97 SHA-256: 8f4cbee229a35d5cedcd4751f49ac7233b3dcedd462a53d25727f3d3dc907e42
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful content. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/free-star-codes-roblox-game-hack In PDF document text
    • http://repository.unla.ac.id/repository/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/robux-sites_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-survey_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
stream_003_off0000498c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x498C 25864 bytes
SHA-256: ef24c58a87a510b967acce0960012f02962393c0440d5afadf06ce998382ba0a
font_01_sfnt_off0000836e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x836E 18456 bytes
SHA-256: e0fd33c50d9e2ad93d9aab52f856c44adae9b6ad9d7cb110af9757aef404b6ba

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