Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d43ab3eef1229e2…

MALICIOUS

PDF

48.0 KB Created: 2021-05-12 17:05:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e03413dd3e1f3c839cc9ae4d174e072e SHA-1: 0f2cdfd05ab4158d7af5f6ea5b80cd715b048b23 SHA-256: 2d43ab3eef1229e271401f748999bd304281232f2432d7c7e73e80b09598460f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'robux generators'. The presence of a download button lure and the ML classifier's high confidence score further support the malicious nature of this document. Although no scripts were explicitly extracted, the embedded URLs and the nature of the lures suggest an attempt to trick users into downloading further malware or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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 https://netcdn.xyz/app/431946152/robux-today-game-hack In PDF document text
    • http://kfz-service-etp.de/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://kfz-service-etp.de/images/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://kfz-service-etp.de/images/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://kfz-service-etp.de/images/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://kfz-service-etp.de/images/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://kfz-service-etp.de/images/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kfz-service-etp.de/images/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://kfz-service-etp.de/images/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://kfz-service-etp.de/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://kfz-service-etp.de/images/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://kfz-service-etp.de/images/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://kfz-service-etp.de/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://kfz-service-etp.de/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://kfz-service-etp.de/images/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://kfz-service-etp.de/images/coin-master-hack-ios-10_GM406889139.pdfIn PDF document text
    • http://kfz-service-etp.de/images/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://kfz-service-etp.de/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://kfz-service-etp.de/images/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://kfz-service-etp.de/images/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • http://kfz-service-etp.de/images/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48F2 28600 bytes
SHA-256: 6d50d1b6564eb5e8ee4ab3491fb712135edb2a61e034421fb7a7638a2dfc7e88
font_01_sfnt_off00008b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4D 2880 bytes
SHA-256: 552e62132cae3603ce0819827e44d96a992bd06014cc5080bf3af4b2ea155b3e
font_02_sfnt_off00009526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9526 19628 bytes
SHA-256: 5f029a61ecac40ae035d9f3965ec2c650c1942f06ed5fa72a0099439767898ff

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