Malicious PDF — malware analysis report

Static analysis result for SHA-256 acf05f5a53463cda…

MALICIOUS

PDF

45.8 KB Created: 2021-05-11 06:33:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 70ad3a0f17af8fe8711cb80c215777ee SHA-1: 09c82391c9fdfad05d5a0ee0d33272e37fab2ef4 SHA-256: acf05f5a53463cda4fe6450433b4e027a9c26ae1096cb682889c3fede71f7140
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to a known malicious infrastructure, disguised as a 'Coin Master' game hack generator. The document body and heuristics indicate a lure designed to entice users to click these links, likely leading to malware download or phishing. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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 https://netcdn.xyz/app/406889139/coin-master-free-spin-link-today-2021-game-hack In PDF document text
    • http://projectunionstreet.com/library/repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/get-robux-com_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-spin-hack-without-verification_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c6c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C6C 24592 bytes
SHA-256: a45906f51041d1125b318307b70ff18c1519eafbfa4aab179bd16c1eb2014ec2
font_01_sfnt_off00008539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8539 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EEB 18812 bytes
SHA-256: 209d45ed87732d827821998a5283e56b95c39a3af4032faff2e6da7d3e76f78f

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