Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d358498d7800c4b…

MALICIOUS

PDF

34.9 KB Created: 2021-06-29 17:48:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fe19fc8029e30e8b973c1fce80ab7c50 SHA-1: f6e2f2f16c43b5206d19adfa2eec5f6cedb93508 SHA-256: 1d358498d7800c4b9d67620a21ec6b0547a209a838b293e2348fae7f74fd1557
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users into clicking on "free generator" or "game hack" sites, which are identified as malicious redirectors and SEO link farms. The document body and embedded URLs explicitly mention 'free Robux scam' and 'game hack', indicating a phishing or scamming attempt. While no scripts were directly extracted, the PDF structure and embedded links suggest a malicious workflow aimed at redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.co/app/431946152/free-robux-scam-the-scammers-game-hack In PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-hack-roblox-ultimate-driving_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-roblox-gift-cards-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-roblox-carf_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-roblox-soldier-gfx_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/robux-hack-ohne-puk-und-handy-nummer-ein-zu-geben_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-apk-hack-no-survey_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-booga-booga-speed-hack_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/pokemon-go-free-promo-code_GM1094591345.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-golden-suit-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/get-free-bc-tbc-obc-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-promocode-hacks-pastebin_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-unlimited-robux-hack-working-2021_GM431946152.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_off00003141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3141 22380 bytes
SHA-256: 49c96e07d53181929554778e898651148096adbcfe9f5a1fd625475e7da066de
font_01_sfnt_off0000633c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633C 19144 bytes
SHA-256: 0aaf49123bf5fe08192c98bc30c5f3949406a2f92c27f50cad0f5c7db88f7fce

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