Malicious PDF — malware analysis report

Static analysis result for SHA-256 659695752fc39162…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 13:40:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 367aa1a872586a2b0f47b60210b385bc SHA-1: ac02f110e52cedbfec8ab3ca3ec0f3cf8a7c618b SHA-256: 659695752fc39162b1574cb6ddc66002b40c4307d6b9a1be92a47bea5a826ee4
220 Risk Score

Malware Insights

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

The PDF document contains numerous links designed to lure users into clicking on them by promising free in-game currency or hacks for popular games. The primary link redirects to malicious infrastructure, indicating a phishing or scam attempt. The document's structure and content suggest it is part of a larger campaign to drive traffic to potentially harmful sites.

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/431946152/roblox-free-robux-join-group-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-dinosaur-simulator-how-to-get-megavore-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/is-there-a-way-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hack-999999-robux-movil_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-roblox-xbox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hacks-for-roblox-mobile_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/thicc-legends-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-pin-t-shirt_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/fortnite-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/codes-how-to-get-free-robux_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_off00003029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3029 21584 bytes
SHA-256: ea8bc25eceb40db51c4654763b8aa45f295aa5401c2b8603ceb0a810ff80c776
font_01_sfnt_off00005f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F93 19252 bytes
SHA-256: 913d0b57da4bac801ef0429cd8ea37bf465a7433bceefc6fe69088acbdc31df9

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