Malicious PDF — malware analysis report

Static analysis result for SHA-256 156440f6f21224e4…

MALICIOUS

PDF

34.4 KB Created: 2021-06-18 12:03:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 040c66c5ca1fad89b35bbb244634cfe2 SHA-1: 71c6ac8da4dba42010b873a76fc82959ab781d5f SHA-256: 156440f6f21224e48559198c0ea55d4e23e934752a1022321f482a0a4b2d3ca1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to what appears to be a lure for game hacks and generators, specifically mentioning 'Free Robux'. One of the primary links, http://netcdn.co/app/431946152/free-robux-obby-2021-game-hack, is flagged as a malicious redirector. The document body also contains numerous URLs pointing to similar hack-related content, suggesting a phishing or scam attempt. No scripts were extracted, but the presence of malicious redirectors and scam-like content indicates a high likelihood of a phishing or malware distribution 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.co/app/431946152/free-robux-obby-2021-game-hack In PDF document text
    • https://miraller.com/upload/files/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/free-games-coin-master_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-free-box_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/roblox-free-download_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/free-robux-real-working_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/lag-switch-hack-roblox_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • https://miraller.com/upload/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/pubg-uc-price-in-bd_GM1330123889.pdfIn PDF document text
    • https://miraller.com/upload/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/free-boat-ride-roblox-funneh_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/free-2021-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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DFA 22528 bytes
SHA-256: 61a3887c414a1dce52d5c4897f4d517d931759c075afeb8457c1f6d52f76be0d
font_01_sfnt_off00006069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6069 19300 bytes
SHA-256: b480e57f7d5b556cc4767b9b3cb0f03098c0ecbb180f8a5a4d5272ae73f4a644

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