Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a02e1bec66267b5…

MALICIOUS

PDF

33.8 KB Created: 2021-06-26 20:55:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0e5a66b1ef5307b4faad57eb53e9e294 SHA-1: 095b4baf6f6edb5cfb13a0f6d088a47d6e148d94 SHA-256: 1a02e1bec66267b567c8f1282fc458289dcf00c45fda31aaa2ae4173618b4c21
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a malicious redirector and a large number of other PDFs, many of which are also related to game hacks and cheats. The document body explicitly mentions 'Roblox New Have County Hack' and includes the malicious URL, indicating a lure for users seeking cheats. The presence of embedded URLs and the structure suggest an attempt to drive traffic to malicious sites, likely for further exploitation or scamming.

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/roblox-new-have-county-hack-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-hack-deutsch-auf-pc-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-hack-grand-blox-auto-on-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/tiktok-free-likes-and-views_GM835599320.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/robux-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/www-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-hack-in-roblox-jai_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-ios-10_GM406889139.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_off00002cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB0 22124 bytes
SHA-256: a4b40b0ffaa3e24020ecb965502a8b8549df53b2865d820d3b28912d4caf5361
font_01_sfnt_off00005db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB7 19356 bytes
SHA-256: 673f89cfe3ddc340c2e302f06aecba61f822b36b636253d899e49630110c27de

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