Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e9c4df131f69356…

MALICIOUS

PDF

35.6 KB Created: 2021-06-26 22:14:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2e85aaad292625884b826b91ea55fbf4 SHA-1: e3827f68bac26b19b08a9f98e7e645f959c7bf01 SHA-256: 8e9c4df131f693565fcdd7bc7c8e8a399e3eb0579e102b3ecebb2bd534d583b2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure. The document body and embedded links promote 'free Robux generators' and 'game hacks', which are common lures for phishing and malware distribution. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-generator-no-download-no-surveys-2021-game-hack In PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/free-robux-android-app_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/howto-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

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_off0000315a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315A 22344 bytes
SHA-256: 8d82db6ddfd7635378312473d0014fc39b44c70f4ab008cf81579811cd1a5a92
font_01_sfnt_off000062e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E5 20096 bytes
SHA-256: cd8d610abffcfa555b6b0575b6b4a45e01cef2ebcf46a9743c1018a7b8c36bd2

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