Malicious PDF — malware analysis report

Static analysis result for SHA-256 b87f5cf9a07a6723…

MALICIOUS

PDF

33.6 KB Created: 2021-07-09 02:39:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b448efa066b5d5473510b0a245da8a6c SHA-1: 6a812f28b4159d6465c59a23309052c7ba97e417 SHA-256: b87f5cf9a07a672362fd331ef929c1ba491ce094466e4f65388170b44a2124fb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirectors and potentially malicious websites, masquerading as game hacks and free currency generators. The primary lure is 'blox-best-robux-game-hack', which leads to a known malicious redirector. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting these sites, likely for further malware delivery or credential harvesting.

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/431946152/blox-best-robux-game-hack In PDF document text
    • http://cintabaca.org/katalog//repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/ben-10-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-robux-for-free-2021-easy_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/blox-fun-info_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/do-illegal-aliens-get-anything-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-reversed-reality-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-roblox-figures_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/pubg-uc-add_GM1330123889.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/cheat-code-sight-on-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/como-usar-hacks-en-booga-booga-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-clothes-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-hack-the-computers-on-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E4E 21920 bytes
SHA-256: 5af1f006f0215925b170a206c1ec455f9b0ce45c9ced1a166b0ec90f68e9d5fc
font_01_sfnt_off00005ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED2 18728 bytes
SHA-256: beb9102fb9ccdcb8dd558d5dcd27b2d7f75eabf9ef026969fea69f0881a387a0

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