Malicious PDF — malware analysis report

Static analysis result for SHA-256 294a779c103fab64…

MALICIOUS

PDF

34.2 KB Created: 2021-07-08 05:01:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a1dd977287c1ee27ae85a11bf98e756f SHA-1: aa1f7898b39fb2f5e517dcc4efc5a31cb4997b6d SHA-256: 294a779c103fab64082d4ac4ae0d1ad9d1fe09e96705aed047c75b673464bf48
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on domains associated with malicious redirectors or link farms. The document body explicitly mentions 'game hack' and 'free generator' lures, indicating a social engineering attempt to trick users into visiting these sites. The presence of multiple PDF links suggests a strategy to distribute further malicious content or phishing pages.

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.tw/app/431946152/how-to-get-roblox-premium-for-free-game-hack In PDF document text
    • http://battistibrothers.com/system/userfiles/files/tiktok-free-likes-no-survey_GM835599320.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/roblox-cs-go-hack-nasl-yaplr_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/cheat-roblox-phamtom-force_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/hacker-robux-free_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/how-to-get-cinnamon-hair-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/roblox-natural-disaster-survival-how-to-get-free-balloon_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/roblox-hack-ad_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/spam-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/can-i-play-roblox-for-free_GM431946152.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
font_00_sfnt_off00002e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7E 22100 bytes
SHA-256: 24023dbabad938424451bf872774f24b5dd699227da941dff7b51a5794596e09
font_01_sfnt_off00005f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F17 19592 bytes
SHA-256: 700e86d9e9945eaf1801824d97f7a99f88438ba1c5c62b344f352fefc119caa5

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