Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b8d0c34c05e9e1…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 13:09:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 177473a8237c33bc31991d3c847413c7 SHA-1: d99b6313f033c98c2886947696b204720ab879f5 SHA-256: 08b8d0c34c05e9e16641d61c716867e5b4eb37a9be80412048dfb4a65d4b946c
220 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on domains associated with malicious redirectors and SEO link farms. The primary lure appears to be 'free game hacks' and 'free Robux', designed to trick users into clicking through to potentially malicious content. The document body and embedded URLs strongly suggest a scam or phishing attempt, likely leading to further malware downloads or credential harvesting.

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/free-robux-codes-game-hack In PDF document text
    • http://tckontrola.hr/files/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/hacks-para-roblox-sin-virus_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/pokemon-go-free-qr-code_GM1094591345.pdfIn PDF document text
    • https://tckontrola.hr/files/new-roblox-swordburst-2-hack_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/best-free-items-roblox_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/assassin-roblox-codes-2021-october-free-exotic_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/how-to-get-free-robux-in-the-game_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/hack-no-virus-roblox_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/roblox-free-roming-camera_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/gun-script-hack-roblox-pastebin-2021_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_off00002dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD8 22736 bytes
SHA-256: c8a70fa34a85a16590c5da7412344d4ed2dc883cac788af7bc720a0f346725e0
font_01_sfnt_off0000610c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x610C 18888 bytes
SHA-256: 0b210ae1d2f25d9b8ac974921f9fa88679103a832855b836aa7747c7a59cf8bc

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