Malicious PDF — malware analysis report

Static analysis result for SHA-256 43f6379db85b3fab…

MALICIOUS

PDF

34.9 KB Created: 2021-06-28 14:15:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4ca86a11e48be9e61c26d7b95b0694cc SHA-1: ad39d0a94b661bb13f56f8d86878efa8f92717f3 SHA-256: 43f6379db85b3fab6c2388200cf42e2a780c6d5b793d41abf950d0e73a169e65
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link disguised as a 'free generator / game hack' which is a common lure for phishing or malware delivery. This link redirects to known malicious infrastructure, indicating a likely attempt to lead the user to a malicious site or download. No scripts were extracted, but the presence of embedded URLs and the critical heuristic firings strongly suggest a social engineering attack.

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/roblox-field-of-battle-gold-hack-game-hack In PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/robloxcom-free-kkk_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/roblox-anti-speed-hack-fe_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-monster-parts-roblox_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/master-coins-free_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-use-scripts-in-roblox-hack_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_off00003140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3140 22336 bytes
SHA-256: fb62632fd05b7364f86e0e6d23f0e440b3514c4c3a4098ae244d88f5eb8085b1
font_01_sfnt_off000062f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F1 19220 bytes
SHA-256: 71a4ff7362d4de0ed5dd7c000996f84b95427dcca021fbffb7b1900bcfef70f0

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