Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43a518dec68d5cc…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 21:51:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1ca2081ca986d2cf0ed6cd529b79dedd SHA-1: 7ef4ae2f310e4ac04f8ddd334c5205e9d420b279 SHA-256: c43a518dec68d5cc32ce86b540e8801c3752ed23dde85dd25d9f7f70fdadfe62
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that lure users with promises of game hacks and generators. The primary malicious link is http://netcdn.tw/app/479516143/minecraft-for-free-on-phone-game-hack. The document's content and heuristics strongly suggest a social engineering tactic to drive users to potentially harmful websites, likely for further malware delivery or phishing. No scripts were extracted, but the embedded URLs and the nature of the lure are sufficient indicators of malicious intent.

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.tw/app/479516143/minecraft-for-free-on-phone-game-hack In PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/counter-blox-roblox-offensive-hack-download_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/roblox-money-cheats-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/how-to-get-free-admin-on-roblox-mad-murderer-2_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/how-to-get-robux-hack-without-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/how-to-hack-in-roblox-dungeon-quest_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/what-is-the-best-free-for-all-roblox-game_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/roblox-kick-me-whon-i-cheat_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/roblox-hack-2021-download_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/roblox-hack-vermilion_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/flame-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/how-to-get-free-stuff-on-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/download-roblox-paintball-hacks_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/infinite-money-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/free-999billion-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/shredder-machine-roblox-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3103 22144 bytes
SHA-256: 7a2af47ae15624072a1cb802a0f54d8b84fc811b6933f126dde6b158bfff5398
font_01_sfnt_off000061d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D6 18316 bytes
SHA-256: 98b982fa9bba8938ef3d8154301223d263821ddf45527be8764ebf15d682b3f6