Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa8e4b94341bb34…

MALICIOUS

PDF

35.7 KB Created: 2021-06-25 11:53:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7c615a7b58e5f4e4abe7ccb106062d8c SHA-1: 1451339d215a4659d81fb3023e849f528584b14e SHA-256: 7fa8e4b94341bb34a8eea696fad4bca684d438a1fea109fe52b4a6ea71ee2737
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures. The document body and extracted URLs strongly suggest a social engineering tactic to trick users into visiting malicious websites, likely for credential harvesting or further malware delivery. No scripts were extracted, but the presence of embedded URLs and the 'malicious redirector link' heuristic indicate a high likelihood of a phishing or scam 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/how-to-get-free-robux-legit-2021-game-hack In PDF document text
    • https://key8013805.com.tw/upload/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/all-free-hair-roblox_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/builders-club-roblox-fre_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/win-free-robux_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/open-coin-master_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-hack-to-get-nightblade-in-murderer-mystery-roblox_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3314 22436 bytes
SHA-256: e90d6102aa76fa207874f8f00541f10fd6f6aa252685dbf1c4df15506440308f
font_01_sfnt_off000064e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E5 19508 bytes
SHA-256: 995c276b2559c1adef7c6a3338530bda4a94db2b001986458efc515656fa3dd5

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