Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bc8e41d2ff0f269…

MALICIOUS

PDF

33.2 KB Created: 2021-07-04 17:07:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 30b53d1456bf7bc47f7f2a70d3bb8f32 SHA-1: 1d5cd5d3465f09e1a9a34a1f2bf9c4e80a86c0ee SHA-256: 1bc8e41d2ff0f269a1bae02f327c42f0ebfd21a2dc0d760ea78c2a652a2a131c
160 Risk Score

Malware Insights

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

This PDF document contains multiple links designed to lure users into clicking on a malicious redirector. The primary lure is for 'free Robux' or game hacks, directing users to http://netcdn.tw/app/431946152/free-robux-2021-game-hack. The ML classifier strongly flagged this PDF as malicious, and heuristic rules indicate it's a redirector lure for game-related scams. No scripts were extracted, but the document's structure and embedded URLs point to a phishing or scam attempt.

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-2021-game-hack In PDF document text
    • https://library.pqm.co.id/repository/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • https://library.pqm.co.id/repository/roblox-hacke-made-city_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/how-to-hack-things-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • https://library.pqm.co.id/repository/hack-in-roblox-bloxburg_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/free-roblox-codes-for-items_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • https://library.pqm.co.id/repository/roblox-mod-hack_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/roblox-doom-cheats_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://library.pqm.co.id/repository/roblox-plus-ultra-money-hack_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/how-to-get-free-robux-2021-not-clickbait_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/robux-no-verification_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/exploit-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • https://library.pqm.co.id/repository/free-cool-boy-hair-roblox_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/how-to-hack-into-ppls-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/bear-face-mask-free-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_off00002d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D62 21448 bytes
SHA-256: a86f55611648936ab3347f521fd7adbdda643ecafac68f5261efc514300e2feb
font_01_sfnt_off00005c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C69 19116 bytes
SHA-256: bd102244ffb40c6add567cd3640126a26b927334c4b0bdc73f6a542841550b4a

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