Malicious PDF — malware analysis report

Static analysis result for SHA-256 263a760a363c100d…

MALICIOUS

PDF

49.3 KB Created: 2021-06-11 00:05:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c45fc736921f1a9a3d4279ab55bdb3cb SHA-1: 07ed77e6aefbb7afca838e3d906cf994b7a644e5 SHA-256: 263a760a363c100dbc17a6d0c7a7def4e0409190450119f24ea31e506d0ea767
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple links to external websites, including a known malicious redirector. The document body and heuristics suggest a lure for game hacks and free currency, which is a common tactic for phishing or malware distribution. The presence of numerous SEO-optimized PDF links further indicates an attempt to drive traffic to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/hack-ghost-simulator-roblox-september-game-hack In PDF document text
    • http://cintabaca.org/katalog//repository/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hacker-un-compte-sur-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/no-human-verification_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/pubg-uc-free-hack_GM1330123889.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-copy-others-chat-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/mega-hack-download-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000500d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x500D 26672 bytes
SHA-256: 4e8f15c204c83cd1d8395fe68f0112f0bfcfed6aa2f581d37382754ce93cdbf1
font_01_sfnt_off00008e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6A 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B7C 19148 bytes
SHA-256: 967940da2bd02e443746355b66e97cc6f32dacfd7366129d7922b3094942652f

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