Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcef59516f8b4242…

MALICIOUS

PDF

43.4 KB Created: 2021-05-15 00:31:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0b5cd1638d8e501dd46e7fa96d91bbb1 SHA-1: ac0937b3ac91774afda84d6adecf09387cf264f8 SHA-256: fcef59516f8b42421d8703c7538fd6c0d755bb53e66a5bfdea67bfd40a7c0903
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and text lures related to free game currency and hacks, directing users to malicious redirector infrastructure. The primary lure URL is https://netcdn.xyz/app/431946152/how-can-u-get-free-robux-game-hack, which is associated with known malicious redirectors. The document's content and structure strongly suggest a phishing or scam attempt designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/how-can-u-get-free-robux-game-hack In PDF document text
    • http://linde-erbach.de/images/krnl-download_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/hack-coin-master-apk-32_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004adf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ADF 25548 bytes
SHA-256: 4007ea6015fe5f37ee83d9063d74ac3c8ae6c33e916e9a2856adcec058219fd1
font_01_sfnt_off0000860e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x860E 18696 bytes
SHA-256: 6d387a6157482ae5d4424ea2a1b018d5f079fe6dbc45eeb2149446a5bd008250

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