Malicious PDF — malware analysis report

Static analysis result for SHA-256 8487fef86a8a00e2…

MALICIOUS

PDF

34.4 KB Created: 2021-07-20 19:31:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 67314428a048ad23131524ee9bfef4c9 SHA-1: d0ec2f2a5329add3473a646b61349724f09d94d0 SHA-256: 8487fef86a8a00e2c680ccbec838d3f992fc7e943cceb80e9044e9fea5c323d7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising free Robux and game hacks. The document body and extracted URLs indicate a lure to trick users into visiting potentially harmful websites. The primary attack vector appears to be social engineering via a deceptive document, leading to a redirector that likely serves further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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/431946152/free-robux-no-human-verification-or-survey-game-hack In PDF document text
    • http://domaizdereva24.ru/images/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://domaizdereva24.ru/images/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://domaizdereva24.ru/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://domaizdereva24.ru/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://domaizdereva24.ru/images/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://domaizdereva24.ru/images/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://domaizdereva24.ru/images/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://domaizdereva24.ru/images/free-tiktok-likes-no-survey_GM835599320.pdfIn PDF document text
    • http://domaizdereva24.ru/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://domaizdereva24.ru/images/minecraft-java-edition-free-trial_GM479516143.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_off00002da3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DA3 22956 bytes
SHA-256: c1b5ec90ee8bdb80a3c613dd1dad91bd567096daa841b0af8e502dc4042b6573
font_01_sfnt_off0000612b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612B 19340 bytes
SHA-256: 0be6332f5db9b68e6855cb36399996a21aa6d2b8aae7743af0b009d1ac981dcc