Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1517ed27c53bf4…

MALICIOUS

PDF

35.7 KB Created: 2021-07-06 04:33:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b59fb9dfba4982ea87e90cea37c49cce SHA-1: e45cf087d78aab671e389bcdf670dcc373c49241 SHA-256: 1d1517ed27c53bf481aec9f837aeda497e2b21340d33b1a70c87c7d43d80c37a
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to game hacks and generators, directing users to malicious URLs. The presence of multiple critical heuristics for malicious redirectors and game hack lures, along with the ML classifier's high confidence, indicates a malicious intent to redirect users to potentially harmful content. The document body contains obfuscated text and URLs that likely lead to malware downloads or further phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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-spin-and-coin-link-haktuts-hacking-news-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/roblox-hack-generator_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/find-roblox-on-computer-hack-in-escape-from-the-demon_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-promo-codes-for-robux-2021-no-hacks_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/skisploit-roblox-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/best-legit-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/como-hackear-dragon-ball-fury-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-robux-hack-free-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/guess-the-drawing-roblox-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/gamekit-didnt-give-me-free-800-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/top-10-best-free-tshirts-in-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-phantom-forces-cheat-1-milion-credit_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/cool-kid-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-coin-master-links_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_off0000335f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x335F 23084 bytes
SHA-256: 695d05a14d8d9b85b795aa9b6e252d73d0ed31b2a293a37380306f759619989d
font_01_sfnt_off00006740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6740 18824 bytes
SHA-256: 028a7533a0cffe48b6a3e73a5ec4a7571f128d14e74948211d37bb39bd0384d4

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