Malicious PDF — malware analysis report

Static analysis result for SHA-256 14551cb937819c1e…

MALICIOUS

PDF

50.2 KB Created: 2021-05-19 02:04:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 15faee2fac63ca1bd0812bb95efac0a4 SHA-1: 37f1e5bae04d121bbf9813782f9715c956aba129 SHA-256: 14551cb937819c1e321aa3c231ce670cb30ae38f5d6ee4af6f4142a6407d0158
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains, specifically promoting 'free Robux' and 'game hacks'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms these links point to known malicious infrastructure. While no scripts were explicitly extracted, the document's structure and embedded URLs suggest it's designed to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

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/431946152/earn-robux-today-earn-robux-today-game-hack In PDF document text
    • http://pacatuamigo.com/images/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://pacatuamigo.com/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://pacatuamigo.com/images/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://pacatuamigo.com/images/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://pacatuamigo.com/images/free-robux-co_GM431946152.pdfIn PDF document text
    • http://pacatuamigo.com/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://pacatuamigo.com/images/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://pacatuamigo.com/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://pacatuamigo.com/images/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://pacatuamigo.com/images/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://pacatuamigo.com/images/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • http://pacatuamigo.com/images/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://pacatuamigo.com/images/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://pacatuamigo.com/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://pacatuamigo.com/images/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://pacatuamigo.com/images/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • http://pacatuamigo.com/images/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://pacatuamigo.com/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://pacatuamigo.com/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://pacatuamigo.com/images/how-do-we-get-free-robux_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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b2f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B2F 26892 bytes
SHA-256: c211856b76187148f071d1118ad693c9217e7aede43d702b4109ff5e843878bc
font_01_sfnt_off00008a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A19 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000093fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93FE 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA110 18432 bytes
SHA-256: 50fc1adeb895ae30588f73a493889120d8bf728fc3821c38df9289c33b75de2a

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