Malicious PDF — malware analysis report

Static analysis result for SHA-256 d916becb9ace86b5…

MALICIOUS

PDF

47.1 KB Created: 2021-06-10 19:14:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ce42f4064add003cdd7dea5933c97d34 SHA-1: a38dda283f18ac224b146c67bc85ca4dbde444a7 SHA-256: d916becb9ace86b506ece42a9ee161c3e3224405e40164c0dae8966e008f9ea3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links designed to lure users into clicking on what appears to be a game hack or free currency generator. These links redirect to malicious infrastructure, specifically identified as a known redirector. The document body and heuristics strongly indicate a social engineering tactic to drive users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/how-get-free-robux-on-phone-game-hack In PDF document text
    • http://stikespantirapih.ac.id/home/repository/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/master-game_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5178 24980 bytes
SHA-256: db90b89769460c65473ab322b04eca42e1468df3bb693cbc9db9e84be599459a
font_01_sfnt_off00008ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC5 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00009473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9473 18600 bytes
SHA-256: 96008352e8e20d232d8e7df1b611a16f351a297b1e32d3094a6b99b6974a4c22

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