Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7895f7f97d14fb2…

MALICIOUS

PDF

36.1 KB Created: 2021-07-09 03:47:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0dd34bade833a5ed0e593519abeb6452 SHA-1: 6ad7f90368bd1581f1a2f0b0b6fb43e51792c0fc SHA-256: a7895f7f97d14fb2f8f0ef17b66a917ee05b5f15faf8ce69e5ee27e96805e9cb
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one to a malicious redirector at http://netcdn.tw/app/479516143/minecraft-hacked-client-download-game-hack, disguised as a game hack download. The document body and numerous embedded links suggest a lure for users seeking in-game advantages, which is a common tactic for distributing malware or phishing for credentials. No scripts were extracted, but the presence of malicious redirectors and link farms indicates a high likelihood of a malicious workflow.

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/minecraft-hacked-client-download-game-hack In PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-iphone-2021_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/roblox-robux-hack-free-no-download_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-for-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/google-roblox-free_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-with-edit-this-cookie_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_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_off00003630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3630 22768 bytes
SHA-256: d2185a2bb64b3e925a11cc7ea48ef30299c9a77579e0d5ddb7fce2261b0c5be2
font_01_sfnt_off00006924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6924 18748 bytes
SHA-256: aa0b1002d10e7fb60172ce49cbdaa5952bdb54bf3081edf3cb6a3acd957b60a1

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