Malicious PDF — malware analysis report

Static analysis result for SHA-256 5716a4d0f84f02c7…

MALICIOUS

PDF

36.3 KB Created: 2021-07-05 23:26:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6f6846666448fbf94fa4ac7edc359409 SHA-1: af72b57bf26e47701d7f502b8f4f7805a9ddae2e SHA-256: 5716a4d0f84f02c788b56667cd2b01fcd14218c7c11027cabf3212c6ed33145f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/431946152/roblox-games-with-free-radio-game-hack PDF link annotation
    • https://e-learning.mtsn1klaten.sch.id/__statics/gudangsoal/files/ninja-hack-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn1klaten.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn1klaten.sch.id/__statics/gudangsoal/files/roblox-hack-khol-admin-perm-codes_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn1klaten.sch.id/__statics/gudangsoal/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn1klaten.sch.id/__statics/gudangsoal/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn1klaten.sch.id/__statics/gudangsoal/files/how-to-make-cheat-engine-work-on-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn1klaten.sch.id/__statics/gudangsoal/files/roblox-pain-exist-hack_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn1klaten.sch.id/__statics/gudangsoal/files/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn1klaten.sch.id/__statics/gudangsoal/files/roblox-airport-free-game_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn1klaten.sch.id/__statics/gudangsoal/files/roblox-the-quarry-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn1klaten.sch.id/__statics/gudangsoal/files/roblox-hack-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn1klaten.sch.id/__statics/gudangsoal/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn1klaten.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn1klaten.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn1klaten.sch.id/__statics/gudangsoal/files/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn1klaten.sch.id/__statics/gudangsoal/files/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn1klaten.sch.id/__statics/gudangsoal/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn1klaten.sch.id/__statics/gudangsoal/files/youtube-how-to-get-unlimited-free-robux-with-proof-november_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn1klaten.sch.id/__statics/gudangsoal/files/pwnapple-roblox-hack_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn1klaten.sch.id/__statics/gudangsoal/files/coin-master-hacked-apk-download-for-android_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
font_00_sfnt_off000032bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32BB 23204 bytes
SHA-256: 22f48246c947d002542d04ffb3a11ea075176e763e50fff996f0ae14920f0387
font_01_sfnt_off0000673f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x673F 19672 bytes
SHA-256: f95dd200a0d9ebe3f0c78a1b197e175e38bd8620cbfe43533c56aa3797e539ea

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