Malicious PDF — malware analysis report

Static analysis result for SHA-256 88a13ecf73038ddf…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 07:24:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d733dc6a772b9fd606bc987598e96529 SHA-1: 8618dff8e5732a7bb3c2924f5e08add74dda258b SHA-256: 88a13ecf73038ddfac54930df7ccdff2c83ac84d82f7fa29e1f5fdfa70dd0676
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and other PDF files, masquerading as generators for game items or hacks. The heuristic firings indicate that the PDF is designed to redirect users to malicious infrastructure, likely as part of a phishing or scam campaign. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/479516143/free-minecraft-accounts-reddit-game-hack In PDF document text
    • https://surpetgarut-tmcollection.com/ckfinder/userfiles/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://surpetgarut-tmcollection.com/ckfinder/userfiles/files/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • https://surpetgarut-tmcollection.com/ckfinder/userfiles/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • https://surpetgarut-tmcollection.com/ckfinder/userfiles/files/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • https://surpetgarut-tmcollection.com/ckfinder/userfiles/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://surpetgarut-tmcollection.com/ckfinder/userfiles/files/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • https://surpetgarut-tmcollection.com/ckfinder/userfiles/files/hack-robux_GM431946152.pdfIn PDF document text
    • https://surpetgarut-tmcollection.com/ckfinder/userfiles/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://surpetgarut-tmcollection.com/ckfinder/userfiles/files/jailbreak-script_GM431946152.pdfIn PDF document text
    • https://surpetgarut-tmcollection.com/ckfinder/userfiles/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://surpetgarut-tmcollection.com/ckfinder/userfiles/files/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://surpetgarut-tmcollection.com/ckfinder/userfiles/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://surpetgarut-tmcollection.com/ckfinder/userfiles/files/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • https://surpetgarut-tmcollection.com/ckfinder/userfiles/files/coins-master_GM406889139.pdfIn PDF document text
    • https://surpetgarut-tmcollection.com/ckfinder/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://surpetgarut-tmcollection.com/ckfinder/userfiles/files/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • https://surpetgarut-tmcollection.com/ckfinder/userfiles/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://surpetgarut-tmcollection.com/ckfinder/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://surpetgarut-tmcollection.com/ckfinder/userfiles/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://surpetgarut-tmcollection.com/ckfinder/userfiles/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56CF 24940 bytes
SHA-256: 9ada41b609dcfe03d2eaf07f85f64eaa1e73aa4aded94360066ed009e43f8c02
font_01_sfnt_off00008f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F98 18024 bytes
SHA-256: 8cc2f99dc924a15d52918b37ec4a77595277c9fc296e6ac0964170e61a15a16b

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