Malicious PDF — malware analysis report

Static analysis result for SHA-256 85758baecb29d029…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 12:51:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2ba8f3fb09d2809cb7585eacc4c395c0 SHA-1: 0a3b45e84987257521a270ee4980a61b22f87d09 SHA-256: 85758baecb29d0294c70f5e32ee5c86819555a92f4eba2fd3595c735c4d0d1cf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free game currency and hacks, directing users to malicious redirector URLs. The document body contains multiple links to external sites, including http://netcdn.tw/app/431946152/free-robux-site-game-hack, which is flagged as a known malicious redirector. The presence of embedded URLs and the lure suggest an attempt to lead users to potentially malicious content or further malware downloads.

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.tw/app/431946152/free-robux-site-game-hack In PDF document text
    • http://www.salwangurgaon.com/files/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-do-you-get-followers-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-hack-roblox-top-model_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/dupe-tool-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/impact-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-use-cheats-on-roblox-deathrun_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/claim-gg-free-robux-app_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/roblox-oof-combat-hack_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/robux-download_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/pubg-uc-kr-version_GM1330123889.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/robux-money_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-get-free-robux-and-tix-no-hack_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/como-hackear-cuentas-en-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_off000030dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DC 23288 bytes
SHA-256: 65c2687d0cc60bce9e80525a7f306dedbb494f7af10c74e919fb5d0209dfebf3
font_01_sfnt_off0000652a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x652A 18940 bytes
SHA-256: f9f1f7c9b928d5f6ce6bf7d440be5e4499b495936a7ada93416c0d904b92215a

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