Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c113684d9d6fe2…

MALICIOUS

PDF

35.2 KB Created: 2021-07-03 12:29:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 013458c5119a644f78521295312278d2 SHA-1: 4b20f8e742b4f4d0e332d38ca4d5259f915e80fe SHA-256: 67c113684d9d6fe261447f064b711456bca68c55ba9b6c118920ce04220b6a72
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on "game hack" or "free robux" related content, with the primary link redirecting through known malicious infrastructure. The document body and heuristics indicate a clear intent to drive traffic to potentially malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/hackear-coin-master-2021-game-hack In PDF document text
    • http://library.unissula.ac.id/fe/repository/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/ezrewards-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-real-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-roblox-tshirt-shark-blox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-free-admin-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-34-5-hack_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/spin-and-coin_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-robux-for-no-cost_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-hack-a-model-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-2021-no-survey-or-verification_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/can-tiktok-free-views_GM835599320.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-spins-october-28-2021-coin-master_GM406889139.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_off000032c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32C2 22960 bytes
SHA-256: 40593a365a077401d8dde9afd43061700267619ba0d225a59ade4d972432d066
font_01_sfnt_off00006663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6663 18408 bytes
SHA-256: e12145284ed43bacda9ea04b287d11ad422f80f0b9ba3e5eb455bf472c7ad3e4

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