Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cbfedec534c5d2c…

MALICIOUS

PDF

45.3 KB Created: 2021-05-19 04:33:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0225a16fa47d44fea9212a3587716326 SHA-1: 6a95437df2e3db61f00440da7f3e1bf33b72ee6f SHA-256: 6cbfedec534c5d2ce7fa4aab0b7dc4deefd8d81cab869379582b68f959785093
200 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and sites offering game hacks, indicative of a lure to download further malware or engage in phishing. The document body, though heavily obfuscated, contains references to 'Pokemon Go Free Yanmega' and a URL matching the malicious redirector, reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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/1094591345/pokemon-go-free-yanmega-game-hack In PDF document text
    • http://webstan.be/images/robux-com-free_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://webstan.be/images/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://webstan.be/images/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • http://webstan.be/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://webstan.be/images/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/coin-master-card-collection-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
stream_003_off00004a47.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A47 24416 bytes
SHA-256: fb7b79b01438f78b580fd0f7d026f15a442535f79fc931f946bb2a4a905cf511
font_01_sfnt_off000081bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81BB 3436 bytes
SHA-256: 97acb3dfe99d8aca5d6f8db8393b488ed98b2263432579da10c481344d87daf1
font_02_sfnt_off00008dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD3 18520 bytes
SHA-256: 23cd411ad361c724214cc2efdefa5f93760b7715b7994da4f20b7999ee48ce50

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