Malicious PDF — malware analysis report

Static analysis result for SHA-256 354909d5bed1adf5…

MALICIOUS

PDF

35.3 KB Created: 2021-07-01 06:30:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 1c249b048d228ae557bcc35b000053d2 SHA-1: 466847e8c82bef5a427d7342f6aa60a93a7ebd7a SHA-256: 354909d5bed1adf5cd0f43e0232325852dbd9a32025434e1eedd344055fd1a41
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and embedded text that lure users with promises of free Robux and game hacks. These links direct to a known malicious redirector and an IP address hosting further PDF lures, indicating a phishing or scam campaign. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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-game-on-roblox-2021-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/robux-free-online_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/synapse-x-best-free-roblox-exploit_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/como-hackear-roblox-para-tener-robux-en-telefono_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-into-roblox-account-roblo_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-las-vegas-money-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-generator-hack-2021-no-survery_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/anarchy-v3rm-hack-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/getgaming-resources-roblox-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-cheat-unknwocnehats_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-make-a-free-robux-game-on-roblox-alvinblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/skisploit-roblox-hack_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_off00003139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3139 22592 bytes
SHA-256: fbb7f7a83a80fd10592f7756a51fb1bb7f41a186151d2be2fca034a4b5b1276d
font_01_sfnt_off000063f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F9 19452 bytes
SHA-256: 708764d8bf3d11fdba549eb794cf3297c15dddb9fdfdefff66d375c1cc2b4134

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