Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7b85ef80746185…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 07:34:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f3d3b95422e86f3e9275d006c59e1dfe SHA-1: 010e023c3f2442418656d80105e9abef17f15b23 SHA-256: 1f7b85ef80746185cb951d81637c464445127851b29777068b525d8d820e73a8
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors, disguised as "free generators" and "game hacks" for popular games. The document body and embedded URLs strongly suggest a lure to trick users into visiting malicious websites, likely to download further malware or engage in credential harvesting. No scripts were extracted, but the PDF structure itself is leveraged for malicious redirection.

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/479516143/free-games-like-minecraft-game-hack In PDF document text
    • http://digilib.unla.ac.id/repository/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-free-gamepass-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/pokemon-go-free-license-key_GM1094591345.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/fly-hack-roblox-jailbreak-download_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/equixel-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/tiktok-free-folowers-75_GM835599320.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-followers-for-tiktok_GM835599320.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-admin-roblox-how-to-turn-itto-others_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/cool-minecraft-hacks_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
font_00_sfnt_off00003087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3087 22584 bytes
SHA-256: 5ab8507196ea5d71b5d710a74f431e24fd8e413f0aaad37595bbd5f61ee16fcb
font_01_sfnt_off000062d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D0 18288 bytes
SHA-256: c5afde6118f97a24b097830618cd2378ca81f41e77fa2f8a16f9c5b84109a368

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