Malicious PDF — malware analysis report

Static analysis result for SHA-256 225956aab7179cfc…

MALICIOUS

PDF

35.3 KB Created: 2021-07-02 07:17:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 8f4cfed990c5f61d16b0154b1742c2f4 SHA-1: 5f3fecf0ba941b6b4528e19a0f2ed322627257fa SHA-256: 225956aab7179cfcc56acc9f5c04d17bb11f2041b7cae3dfdbcbc285425e4a85
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure of free game currency and hacks to trick users into clicking malicious links. The document contains numerous links to external sites, including a known malicious redirector and an IP address literal, suggesting a phishing or malware distribution campaign. The ML classifier strongly indicated maliciousness, and the heuristics point to a link farm designed to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-roblox-gift-card-pin-codes-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/roblox-promo-codes-october-2021-free-robux_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/roblox-jailbreak-wall-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-jailbreak-hack-mega_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/como-hackear-dragon-ball-fury-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-anything-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-hack-pro_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-roblox-games-without-signing-in_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-and-tix-generator-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hack-roblox-account-to-get-password_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/money-cheats-for-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/mcpe-116_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hot-to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-free-gift-card-codes-unused_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hban-hacks-in-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-promotion-codes-roblox_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_off00003297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3297 22504 bytes
SHA-256: 2e24cc05c58e342d7d1da9a221411dd778b1d33876d5f0a025a3a5ba9941ab0d
font_01_sfnt_off0000648e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648E 19204 bytes
SHA-256: e923c9bf2b651bd0190cdfc952edcf3e6586168574ea2dddbf8b1f8ae7b2438f

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