Malicious PDF — malware analysis report

Static analysis result for SHA-256 413f2cddef0e8d4b…

MALICIOUS

PDF

41.9 KB Created: 2021-05-13 21:54:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6e30c149c37dcd6e7ccde15b7916de8a SHA-1: 5e26b72c16a4c1550557ab747dfd0ca705615591 SHA-256: 413f2cddef0e8d4b73fb20435483924f957b3b8cf15637f5c82c9b617bc08fd6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure of game hacks and free currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector, which likely serves as a gateway to further malicious content or phishing attempts. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to exploit vulnerabilities or deliver a payload, aligning with techniques like Spearphishing Attachment and Exploitation for Client Execution.

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/406889139/coin-master-card-hack-apk-game-hack In PDF document text
    • http://sd-olimp.hr/files/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-robux-now_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-robux-today_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-spins-and-coins-blogspot-coin-master_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
stream_003_off00004772.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4772 25480 bytes
SHA-256: 07f0599bd4e546a2a3fb9d5a31656fb5a533fe74b6076e603437fcfcf4ed8b5f
font_01_sfnt_off00008216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8216 18068 bytes
SHA-256: 253c022fea36e2edfdded8e932a5d2c5ace7c2c75107348eb73538d72e63084f

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