Malicious PDF — malware analysis report

Static analysis result for SHA-256 b891d823f5bb4f1d…

MALICIOUS

PDF

46.1 KB Created: 2021-05-15 09:04:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 06acfd71c4aefeab91ccee14907ed65c SHA-1: 2eb6b6fb8a5849e4b9a709d77e090c821db3c4b0 SHA-256: b891d823f5bb4f1d615ed54d5860055df14bd15fb07e2fc90ea5e87edf1f34b3
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "free generator / game hack" which links to known malicious redirector infrastructure. The document body and embedded URLs suggest a social engineering attempt to trick users into visiting potentially harmful sites. While no scripts were extracted, the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://netcdn.xyz/app/431946152/how-do-u-get-free-robux-2021-game-hack In PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-free-link-app_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-apk-mod-free-download_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/free-coins-coin-master_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004984.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4984 26344 bytes
SHA-256: fa8b9c8f73c3db8d2f6e649e94f0d43f5b7b615192e8a6e3a57d3235c7ba9d48
font_01_sfnt_off000085b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B9 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00008f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F67 19040 bytes
SHA-256: 14ed63897d8c38c9b74f4ae6c685ddc963b8153977262fdb6411d06658c720a7

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