Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1979385980813c…

MALICIOUS

PDF

44.5 KB Created: 2021-06-03 14:17:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7189418b69a4ce105f69e3ace8dd740e SHA-1: 49092b3eea8bb3d79ad0b1a9ec714041791396df SHA-256: fa1979385980813c0ca5078f333ac78668f8d1547d8f801f1902601cfd437e2a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded links, with a primary URL identified as a malicious redirector. The document body and heuristic firings indicate a lure for 'free generator / game hack' content, aiming to trick users into visiting the malicious URL. The presence of embedded URLs and the nature of the lure suggest an attempt to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-free-spins-cheat-codes-game-hack In PDF document text
    • http://library.umla.ac.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-games-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F0 25632 bytes
SHA-256: df6d762c75dc052c764e95f7b150cb5c83efe5661a7b9bcc368536cad7a2b09e
font_01_sfnt_off00008ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA7 18224 bytes
SHA-256: 2b0c7a21f15b32e61833c84a6137fabd61f149f6731c9eb1b02707dfcd7d2dd9

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