Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d884cd3743616d9…

MALICIOUS

PDF

41.5 KB Created: 2021-05-15 16:03:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b2d8bb3f5bf282594f6fbf73aea38d35 SHA-1: ed505a6702c5371f408e3ed88cc628ea3a022da0 SHA-256: 8d884cd3743616d9b9d63a4a7ca2adce8ba77826b13b534c3ed95da0d1e13758
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as generators for popular games like Coin Master and Roblox. The document body and embedded URLs suggest a lure for users seeking cheats or in-game currency, which is a common social engineering tactic. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-cards-link-game-hack In PDF document text
    • https://gomsa.nl/images/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://gomsa.nl/images/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://gomsa.nl/images/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://gomsa.nl/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • https://gomsa.nl/images/real-robux-codes_GM431946152.pdfIn PDF document text
    • https://gomsa.nl/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://gomsa.nl/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://gomsa.nl/images/abd-roblox_GM431946152.pdfIn PDF document text
    • https://gomsa.nl/images/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • https://gomsa.nl/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://gomsa.nl/images/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • https://gomsa.nl/images/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://gomsa.nl/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://gomsa.nl/images/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • https://gomsa.nl/images/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • https://gomsa.nl/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • https://gomsa.nl/images/get-me-robux_GM431946152.pdfIn PDF document text
    • https://gomsa.nl/images/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://gomsa.nl/images/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • https://gomsa.nl/images/coin-master-working-hack_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_off0000480a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x480A 24884 bytes
SHA-256: 424a39c93eace06f5e1af15fba57768cfb145198cccc8690e9fea6aaab2797c3
font_01_sfnt_off000080a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A5 18056 bytes
SHA-256: 4c00fba11e6222d30ce91962ad0846eff86227a46da4e4704094e367f0981575

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