Malicious PDF — malware analysis report

Static analysis result for SHA-256 d12d94fae14bb252…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 10:58:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 51ca8c76670f87455c263d96ad315eb0 SHA-1: f9ae13769a327eabf530b11a5705b3704ae2945e SHA-256: d12d94fae14bb252349be7107468df3bfc644febd04756c076062a7e7e9bbe45
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.co/app/479516143/minecraft-for-ipad-free-game-hack PDF link annotation
    • https://library.elkatarie.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/aimbot-for-roblox-free-for-all_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-instal-wall-clip-roblox-hack-from-wearedevs_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-lumber-tycoon-2-xploit-free_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/robux-hacks-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-get-free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-free-not-to-download_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/card-code-pw-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/what-player-got-banned-for-using-free-models-roblox_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-get-free-robux-ios-and-pc-october_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-counter-blox-hack-download_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/descargar-asshurt-v32-hack-para-roblox-torrent_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-bloxburg-money-hacks-25-febuary-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-fly-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/where-to-get-robux_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-ghost-simulator-infinite-money-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_off000031a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A6 22456 bytes
SHA-256: caadb65245ba4510a6a81d1cf145fdbe1e21002d3f52d894cefec0d2ab9e9123
font_01_sfnt_off00006397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6397 18348 bytes
SHA-256: 77fda35481488166b96b2314590ed1bd84082cd679e1d5b9431d2b2ae4521319

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