Malicious PDF — malware analysis report

Static analysis result for SHA-256 648f7a212085a14b…

MALICIOUS

PDF

35.8 KB Created: 2021-07-04 23:09:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 63777ef9f6f97b57e032dce9eff26082 SHA-1: 1a18c7df94c9a93ed8f6987e82df4bce553ca96f SHA-256: 648f7a212085a14bbd0b4ed4cb80cb9245e2b8bdf44367400316c325816bbc02
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on them, promising game hacks and currency. The primary link redirects to a known malicious domain, indicating a phishing or scam attempt. The document's structure and content strongly suggest it is part of a campaign to drive traffic to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation 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 http://netcdn.tw/app/406889139/coin-master-hack-apk-no-survey-game-hack In PDF document text
    • http://library.umuslim.ac.id/repository/hacks-for-pet-ranch-roblox-for-free-coins_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-robux-and-tix-using-inspect-element_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-is-hacked-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-coolkids-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/hacker-vs-noob-vs-pro-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-pe_GM479516143.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
stream_002_off00003429.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3429 23224 bytes
SHA-256: 4c489ee0f75aa822a85fa072d41ff2183f97159c26a725da8e4698152164003b
font_01_sfnt_off00006870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6870 18612 bytes
SHA-256: ea471364580b19b0a285475b4c0f13c806daaecf8552f4a25a80e6b014191c7c

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