Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3c7fdae94f844e…

MALICIOUS

PDF

34.3 KB Created: 2021-07-09 03:37:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7fbef629540a546635f7d9abee4505ee SHA-1: cc2652829504cf99cda78a5f0c2582acd5863859 SHA-256: ab3c7fdae94f844ecc5431eb6c772394d1b9910414130cb3fb3756e3b328bf4c
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 'game hacks' and 'free robux'. The heuristic firings confirm these links point to known malicious redirectors and lure users with promises of in-game advantages. Although no scripts were explicitly extracted, the document's structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at driving traffic to potentially harmful sites.

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.tw/app/431946152/hack-slash-roblox-id-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/1x1x1x1-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/good-avator-free-20-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-red-shirt-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/comment-hacker-quelquun-dans-roblox-qui-a-bocou-de-rebux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-robux-no-survey-no-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/gear-me-hack-roblox-november-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/1075-lion-mac-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-credit_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/get-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-clothes-and-hair-boy_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/only-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-shirt-template-with-neck_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
font_00_sfnt_off00002f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6B 22356 bytes
SHA-256: ce27990a84ec29182a313cc7483b80d1d68bdd6f67d4f33d42608ce89bd6b1c4
font_01_sfnt_off00006119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6119 18996 bytes
SHA-256: acd1805954f736df431dd6b1bfda08c592e84b8def0df657aa19045ea78b8871

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