Malicious PDF — malware analysis report

Static analysis result for SHA-256 00992bd24512868c…

MALICIOUS

PDF

36.5 KB Created: 2021-07-05 22:33:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 11396cd42c3d0a95a3a61d0f69e36e24 SHA-1: 0984d609e13375f8d0261f5f8d12de087a2c1284 SHA-256: 00992bd24512868ce13dbe3c68b4e8c06374e3b47a67289cac24a712418b551e
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users. It contains numerous links to redirector infrastructure and SEO link farms, designed to funnel victims to potentially malicious sites. The presence of a 'password-protected archive' lure suggests an attempt to bypass security controls by encrypting a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-free-online-game-game-hack In PDF document text
    • http://katalog.gemalibrary.net/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/robux-download_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-unblock-roblox-hack-a-wifi-password-on-computer_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/games-like-bloxburg-but-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/annoying-orange-costume-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/criminal-vs-swat-roblox-hack_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-hack-free-no-verification_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-coins-today_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_002_off00002f1b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F1B 22700 bytes
SHA-256: 911f095f94aa85f05b467a110d6f9880fc40654ed5c71e810c60f60537756b41
font_01_sfnt_off000061da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DA 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBF 18332 bytes
SHA-256: 4ab4d45f9710508d772b693d83b39f768f95164e2525421f2cc6f40d4eef1e2c

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