Malicious PDF — malware analysis report

Static analysis result for SHA-256 62efeedf231a13aa…

MALICIOUS

PDF

36.3 KB Created: 2021-07-06 13:07:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 6d66ed7e24b5a06897813c6b77849d60 SHA-1: d49fdff92299c2a5888f988342aa5849cf3a48d2 SHA-256: 62efeedf231a13aa3372ed6658390196a4d84a0f44fc2cbeb6f87e4323fd9a02
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free game hacks'. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the nature of the links and the lure implies an intent to lead the user to a compromised site or download a malicious payload.

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/479516143/free-minecraft-bedrock-game-hack In PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/synapses-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/hack-r-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/be-stampycat-roblox-skin-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/www-roblox-com-cheat-in-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/free-robux-cards-2021_GM431946152.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/prooving-that-how-to-get-free-cloths-e-free-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/is-free-robux-real_GM431946152.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/como-hackear-super-dragon-ball-heroes-en-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/robux-hack-2p_GM431946152.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/static-moonactive-net-rewards_GM406889139.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_off00003857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3857 22604 bytes
SHA-256: 6be7590dce0d8c403b38c02e267305740610c7ab1f19885e30a666e8fd40aece
font_01_sfnt_off00006aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABA 18560 bytes
SHA-256: 8a1cf310a32837577002de6ae703504663fc8f6c74f3557264522e251e416ebe

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