Malicious PDF — malware analysis report

Static analysis result for SHA-256 685a71b1ffb76b03…

MALICIOUS

PDF

42.5 KB Created: 2021-05-14 06:06:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6d7431d5d92e04c13c21c14fe41f6a58 SHA-1: 094609ae03f5257255b2b0d421d953ba2cdb24a6 SHA-256: 685a71b1ffb76b03bfecf9899eef8a387ca35ce35a0e7abaea921933d062e5a1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that lead to known malicious redirector infrastructure, specifically designed to lure users with promises of game hacks and free spins. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to these lures and the malicious URLs.

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/406889139/2021-free-spins-coin-master-link-game-hack In PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/free-robux-real-working_GM431946152.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/roblox-weird_GM431946152.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/coinmaster-rewards_GM406889139.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
stream_003_off00004c0e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C0E 24040 bytes
SHA-256: a7cf570bf0d09961d7fccf6c90968b1001e5ca86528c6941a1197745fcb68847
font_01_sfnt_off0000830b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x830B 18456 bytes
SHA-256: a76936ec484ac031b8c5f7bd82bd0b34adbabb4d9e9d5cccdc9978d26973b99a

Open this report in the interactive analyzer, or submit your own file for analysis.