Malicious PDF — malware analysis report

Static analysis result for SHA-256 a67f510804318ca2…

MALICIOUS

PDF

37.4 KB Created: 2021-07-08 06:36:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 11be70fe33a7ed43ffb77e24d789e084 SHA-1: 6c17524e6da28aff2b261d458cf2ee351e7a478c SHA-256: a67f510804318ca20cbf212b565ab8565e5db819dd9d12a48ccb9b56194a3dbd
220 Risk Score

Malware Insights

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

This PDF document contains multiple links designed to lure users into clicking on potentially malicious content, disguised as game hacks or generators. The primary URL, http://netcdn.tw/app/406889139/get-free-cards-coin-master-game-hack, is identified as a malicious redirector. The document also hosts a large number of links pointing to PDF files, suggesting a link farm or SEO manipulation tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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/406889139/get-free-cards-coin-master-game-hack In PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/if-roblox-made-everything-free_GM431946152.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/master-hack-coin_GM406889139.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/real-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B7 22808 bytes
SHA-256: 7ca3b3e622c2c3204444ee75b0a320802d0dcdd97ec21844b7f863941c40eb6f
font_01_sfnt_off000065ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CA 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAF 18172 bytes
SHA-256: ab80e3c1f88e3b8fd7e0672df70ead6a1706ea1e7c7a71db5d1bb16ff27d331b

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