Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c3f86fbd01da05…

MALICIOUS

PDF

37.4 KB Created: 2021-07-06 01:28:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 86f1a3285618cc0f83b874e5bd9e478e SHA-1: 7802ed3cd0627623808fb605f5b627aa7792bacd SHA-256: 80c3f86fbd01da058692d2303c65add0739346132b83873f1df573f1653fda6a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to known malicious infrastructure. The lure appears to be related to game hacks or generators, as indicated by the document body and heuristic firings. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a phishing or redirection attempt to a site that likely hosts further malicious content or exploits. The ML classifier also strongly indicated maliciousness.

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/406889139/coin-master-game-for-pc-free-download-game-hack In PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-a-tiger-free-shard-seekers-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/hacks-for-roblox-pet-simulator_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/5-robux-for-free_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/nopde-engine-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/nre-roblox-adopt-me-hack-script-money-glitch_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-promo-codes-valid-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/aplicacion-de-hacks-para-pc-en-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-jailbreak-noob-vs-pro-vs-hacker_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/what-roblox-games-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-make-a-free-robux-scam_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-ninja-animation-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-speed-client-hack_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-hack-lumber-tycoon-2-on-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/100-free-spins-on-coin-master_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
stream_002_off000036b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36B9 24128 bytes
SHA-256: c01848afb890738b5c5583b37f834068bf4cefd33a75705838959abf89dd5127
font_01_sfnt_off00006dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC8 18992 bytes
SHA-256: 3f6872479ef3b87ebfa0ba52f6a98164127b669b1802ae80a1b5a55708a3981e

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