Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfb853bede269272…

MALICIOUS

PDF

34.7 KB Created: 2021-06-27 03:02:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9dfac579057afb947a5590d7e2947895 SHA-1: 05596b2c2c19eb92fd17ee517455660393b4244e SHA-256: bfb853bede26927296a7f9ab89560438eb1c2efa1c14ae1c1905f693bb815add
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body and embedded URLs reinforce this by advertising 'free generators' and 'hacks' for popular games, aiming to trick users into clicking the malicious link. No scripts were extracted, but the overall pattern suggests a phishing or scam attempt to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.co/app/431946152/roblox-dragon-ball-rage-hack-december-2021-game-hack In PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-tips_GM406889139.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/minecraft-bedrock-free-with-java_GM479516143.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_off00002f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5B 22432 bytes
SHA-256: 957936567519b51aadbd460925b8e740a0015886d491b2d9c4506ccda972b127
font_01_sfnt_off0000615a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615A 19484 bytes
SHA-256: 2e2a30e0d6b968e3210e09497013ee72a3238057cac823c5ca87563e8fce8c24

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