Malicious PDF — malware analysis report

Static analysis result for SHA-256 51cc32440379354b…

MALICIOUS

PDF

34.5 KB Created: 2021-06-27 11:53:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 407781db9c078d33684faf6ded3ec65a SHA-1: 5e998f892fe68aa4aa88ca48e1fe05dbe2d41c68 SHA-256: 51cc32440379354bb77e24571543f2afa0b24835b6b083dee1d3bb69323f6ca7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The document body and extracted URLs suggest a lure for users interested in free in-game currency or cheats for popular games like Roblox and Coin Master. While no scripts were extracted, the presence of malicious redirectors and the nature of the lures indicate a phishing or scam attempt, likely serving as a downloader for further malicious content.

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/roblox-free-templates-game-hack In PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/how-to-get-it-free-robux_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/is-roblox-being-hacked-2021_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/free-roblox-injector_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/pokemon-go-free-spoofer_GM1094591345.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/tiktok-free-fans_GM835599320.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/free-roblox-cards-2021-not-used_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/get-black-eggs-free-egg-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/free-roblox-toy-codes-august-2021_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/how-roblox-got-hacked_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/free-roblox-creator-packs_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/free-robux-download_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

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_off00002f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F84 22396 bytes
SHA-256: fd01d022d06a3d1245846ac5bb6213ce0a5689629f25bd89b585df354237a520
font_01_sfnt_off0000616f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616F 19188 bytes
SHA-256: d1e82aea5820b3a4dbe345b7905c8606f1ed86b164843e86763879315620fa15

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