Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a945d742686feb1…

MALICIOUS

PDF

35.5 KB Created: 2021-07-09 04:36:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0fd11523d346aec2635329e145590462 SHA-1: 1b35f156a216fa3eaff3122007d68b63a9ee1706 SHA-256: 1a945d742686feb1795227d273839ca9a256a81d90cd2e016b835b0f68351336
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are disguised as game hacks or generators for popular mobile games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a tactic to drive traffic to potentially malicious or scam-related content. The primary lure appears to be 'Coin Master Free Coins And Spins Hack', directing users to a suspicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/coin-master-free-coins-and-spins-hack-game-hack PDF link annotation
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/games-on-roblox-that-vip-servers-are-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/how-to-get-free-builders-club-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-hair-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/jailbreak-hack-roblox-script_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F2 23352 bytes
SHA-256: f74be02fbb53da42f2d7c435a4b80e897591d1c886d56c051ec5fbd6db34a566
font_01_sfnt_off000067b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B0 18520 bytes
SHA-256: 29c1b28c0a710d6b876e8a0d8218f7449662a67bbf5932a86ad74a08bedf9ae4

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