Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f1bdbb23648770c…

MALICIOUS

PDF

35.9 KB Created: 2021-07-04 05:05:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1d2ca82c12874eb1242934af1c2985f6 SHA-1: 19c1f209acbd7de207c7a83e2b227b2d05e72424 SHA-256: 1f1bdbb23648770c6f54c3e42d076e35cc7d77b6626a2ca6389f570a5fa4ab9d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and other PDFs, masquerading as game hacks and generators. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs and a download button lure supports a phishing or scamming attack pattern. No scripts were extracted, but the document's structure and content point towards a social engineering attempt to redirect users to potentially harmful content.

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/406889139/coin-master-hack-using-lucky-patcher-game-hack In PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/how-to-get-free-admin-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/roblox-free-name-changer_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/infinite-jump-hack-for-roblox-devs_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/cheat-engine-roblox-torso_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/how-to-get-free-robux-instructions_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/huge-free-robux-giveaway-free-robux-giveaway-livesteream_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/hack-velocidad-x3-roblox_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/como-usar-pastbin-no-roblox-hack_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_off000034e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34E1 22792 bytes
SHA-256: cd4be91b6ad7d455de609a57aded0bcfe3486be659e38af6a0d19cd0fb9fc96d
font_01_sfnt_off000067ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67FF 18832 bytes
SHA-256: 4e42799b3572d1241d93d93b188e429b6a90beaba4def4bd8627acee4e24b07a

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