Malicious PDF — malware analysis report

Static analysis result for SHA-256 325dbd75763b1b3f…

MALICIOUS

PDF

34.5 KB Created: 2021-07-08 23:15:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2eafe996d635649d3627c67ff208af69 SHA-1: 178016269d926344431a91a7d442f5f0557335a5 SHA-256: 325dbd75763b1b3f6263d2cf5d150e9eb354d5bfb2cc6a882a3fb4a39b3e8281
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, likely serving as a gateway to further malicious content or exploits. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/how-do-i-get-free-robux-on-roblox-game-hack In PDF document text
    • https://nexsoftech.com/upload/userfiles/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/pubg-uc-easypaisa_GM1330123889.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/roblox-wall-hack-2021_GM431946152.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/free-face-roblox_GM431946152.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/free-robux-without-a-verifacation_GM431946152.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/default-fortnite-roblox-tshirt-free_GM431946152.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/free-bobux_GM431946152.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/account-roblox-free-2021_GM431946152.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/coin-master-hacks-that-actually-work_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
font_00_sfnt_off00003007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3007 22212 bytes
SHA-256: f06c23c9fb41ad562ccdf0e5f6d5cf5a3e1a7ecdc2e61b470612726b415484f0
font_01_sfnt_off0000615a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615A 19228 bytes
SHA-256: e9643cf535cb35bfe77301aa7fad2e30087b9ada5d7646565701a14096303307

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