Malicious PDF — malware analysis report

Static analysis result for SHA-256 631ed2ef4f38adf9…

MALICIOUS

PDF

44.2 KB Created: 2021-05-19 10:46:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4e02d1a26e4d43818b3ff9cede0ba519 SHA-1: 8c501afe5d2a0749710734b13ce497eb445a7ae3 SHA-256: 631ed2ef4f38adf98826172f061bfbd48328c3b6839eafd46f33630433555434
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector for a 'free generator / game hack'. The document body, though partially corrupted, contains text and URLs related to game hacks and free currency, indicating a social engineering lure. The presence of embedded URLs and the nature of the lures suggest an attempt to trick the user into downloading a secondary payload, likely through the identified redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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/free-spins-link-in-coin-master-2021-game-hack In PDF document text
    • https://ogm-goettingen.de/images/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • https://ogm-goettingen.de/images/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-roblox-com_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-robux-mod_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://ogm-goettingen.de/images/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • https://ogm-goettingen.de/images/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-roblox-toys_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
stream_003_off00004949.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4949 28152 bytes
SHA-256: 65c715b2082b91bc9e3bdd5394a52a3affd6160e7d2de2423d417d677fb31e9e
font_01_sfnt_off000089ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89EF 18456 bytes
SHA-256: 8f5be0faf1f43547a4f613946690c49555a623d75ecb5c591eda2449b2cabce1

Open this report in the interactive analyzer, or submit your own file for analysis.