Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c6dfb2cab66255…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 15:51:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3fe019d33a9fdfdf495859ecc19a3e81 SHA-1: 3b58ed689b05d6b9f158259f36f38b0cbe94270c SHA-256: 29c6dfb2cab66255665d08c6cb0a8214af6d4b3f180d0f52a80d9b52067af15b
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 associated with game hacks. The document body and heuristics indicate a lure to download or access a 'game hack', which is a common pretext for distributing malware. No scripts were extracted, but the presence of malicious redirector links and the lure suggest the document is intended to lead the user to a malicious download or exploit. The primary IOC is the malicious redirector URL.

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-hack-online-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-mad-city-hacks-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/robux-promo-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/get-free-robux-generator-parts-pokemon-silver_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/pixies-gigantic-coin-master-free-spins-and-coins_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_off00003073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3073 22360 bytes
SHA-256: 018a6382ad1aed438276f1a67bcb57896564c5bd11c70ab673e9d267eac0fa32
font_01_sfnt_off0000625d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625D 18336 bytes
SHA-256: 2c253a31a625c9619806f17d3067d340dfcb23f51fc85221a1c31aa1f7ecad8c

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