Malicious PDF — malware analysis report

Static analysis result for SHA-256 61d0542ca091ce5e…

MALICIOUS

PDF

45.3 KB Created: 2021-06-10 12:38:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 308ec2d562909fbdd671ab10dcda2413 SHA-1: c953e78cd50044a4de733b172efd0512e199efb6 SHA-256: 61d0542ca091ce5ecb49ad51d481ff4f23ee26d91cad04189948b95621f834d1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, masquerading as game hacks and generators. The primary lure URL is https://netcdn.tw/app/431946152/roblox-how-to-get-faces-for-free-game-hack, which is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a social engineering attack aimed at tricking users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/roblox-how-to-get-faces-for-free-game-hack In PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/pokemon-go-for-free_GM1094591345.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-online_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/robux-now_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/pubg-uc-with-jazz-cash_GM1330123889.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-how-to-speed-hack-not-patched_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/pubg-uc-vietnam_GM1330123889.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-windows-10-hack-client-2021_GM479516143.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_004_off0000529e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x529E 26724 bytes
SHA-256: a9e416215c4827dbe320af94d03c3fd23cba2795517d0aadf0e0fba19d8de46d
font_01_sfnt_off00008dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD3 18444 bytes
SHA-256: 0bcaf21b000228466c8098f2f7112c8c21b42b2278ae61838667e8077e34b7d0

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