Malicious PDF — malware analysis report

Static analysis result for SHA-256 67394a5b4a8a2c24…

MALICIOUS

PDF

45.7 KB Created: 2021-05-14 13:10:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e6bfc1c6f6781bf094010f2c6911c293 SHA-1: c20c5bed2170257396243d3b95558bf843b35ce0 SHA-256: 67394a5b4a8a2c24b0dfc98c8af54b9adde2286301f4a0479c7cc54ee0158901
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, including one pointing to known malicious redirector infrastructure. The document body and extracted links suggest a lure for game-related cheats and currency, designed to drive traffic to potentially harmful sites. The presence of multiple PDF links also indicates a link farm strategy, likely for SEO manipulation or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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 https://netcdn.xyz/app/406889139/coin-master-gift-link-hack-game-hack In PDF document text
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/real-robux_GM431946152.pdfIn PDF document text
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/roblox-top_GM431946152.pdfIn PDF document text
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/coin-master-online_GM406889139.pdfIn PDF document text
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/coin-master-real-free-spins_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
stream_003_off00004be8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BE8 24796 bytes
SHA-256: ee50235b5f6b981081a589ad0f445ad1ce92e638e1aa6b0932e8ebcdf04239e8
font_01_sfnt_off00008514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8514 3560 bytes
SHA-256: c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93
font_02_sfnt_off00009199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9199 17716 bytes
SHA-256: e1491a72d2c7431630ffc6d787b93bb08da7918aa93baa4fe3434e3e11ca7bef

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