Malicious PDF — malware analysis report

Static analysis result for SHA-256 f58ba738b4245853…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 22:22:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a9fa68971f654e4253dcafb086355430 SHA-1: 515eb362669abdd6d8da78609c1a338d9c584918 SHA-256: f58ba738b4245853bb376fd2067e1974a9225770c879b67a4022486867c10b63
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirector infrastructure, specifically http://netcdn.tw/app/406889139/how-to-get-free-skins-on-coin-master-game-hack. The document body and embedded URLs suggest a lure for game-related cheats or generators, which is a common tactic for distributing malware. The ML classifier also strongly indicated maliciousness.

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/406889139/how-to-get-free-skins-on-coin-master-game-hack In PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-rape-cheat_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-jailbreak-hacks-for-mac_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/cheats-roblox-paintball_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/google-coin-master-free-spins_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
stream_002_off0000335f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x335F 22980 bytes
SHA-256: 3f9586851c109af99deee733e0b467fa353ced88918f9641fab0e0a697e6e258
font_01_sfnt_off000066d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D7 18332 bytes
SHA-256: add889a94660e7441b2b849688d5b5041293811e8c73c1b2aa9120b2671bcd00

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