Malicious PDF — malware analysis report

Static analysis result for SHA-256 2681303e12ca8148…

MALICIOUS

PDF

45.1 KB Created: 2021-05-19 20:28:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ff4715bc8bf7749406213c9fbd376140 SHA-1: 1a797fe1a3656f1d8bfbf9eca4eb13633852f88b SHA-256: 2681303e12ca8148fea76ebc7d223adfd3de97b9caca92c18a8260cc013bc876
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that lead to sites offering game-related cheats and downloads, suggesting a lure for users seeking such content. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the presence of external URIs and the nature of the lures indicate an attempt to trick users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/1094591345/pokemon-go-free-items-code-game-hack In PDF document text
    • http://new-era.com.tw/image/data/files/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-gift-link_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a8c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A8C 24124 bytes
SHA-256: ac1aa5d066a63c5dcecbd069f36f525c5007d9b6212b10dc069df3f1493c316c
font_01_sfnt_off00008194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8194 3636 bytes
SHA-256: 99dd96e89babb04aea0f0ebf99e33ebde901eaa524a16077e4ca0928c8dd6ae0
font_02_sfnt_off00008e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5F 18120 bytes
SHA-256: 584cc096bac67891003bc126dd362810905b331c80dc7a4776bf6d3a790e34d6

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