Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d17d8e7068eca2…

MALICIOUS

PDF

34.6 KB Created: 2021-06-23 11:19:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ae06548158ac1589d1ba20f10b75df1f SHA-1: 006bc6fa2a1444cc372a18bdfa224556eb2205d3 SHA-256: b5d17d8e7068eca2bbdfc813cf5934142d7ce22169575416ddb8e585cb3e1838
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game hacks and currency to trick users into clicking malicious links. The document contains numerous links to redirectors and SEO link farms, including http://netcdn.co/app/431946152/roblox-best-free-catalog-items-game-hack, which is flagged as a malicious redirector. The presence of multiple PDF links suggests an attempt to drive traffic to potentially malicious content or phishing 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.co/app/431946152/roblox-best-free-catalog-items-game-hack In PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/coinmaster_GM406889139.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/roblox-download_GM431946152.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/roblox-how-to-get-free-robux-from-groups_GM431946152.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/roblox-level-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/how-to-teleport-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/bp-to-uc-pubg_GM1330123889.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/without-pokemon-go-free-coins_GM1094591345.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/itsmerade-best-roblox-free-level-7-executor_GM431946152.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/downloading-roblox-link-free-like-no-money-needed_GM431946152.pdfIn PDF document text
    • http://www.yaringhospital.go.th/UserFiles/File/free-robux-no-human-verification-generator_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_off00002fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDB 22536 bytes
SHA-256: d87e71d915770276e69ce75073db3318f9669c88e1c6a1ec950bcaafa62c36f2
font_01_sfnt_off0000623d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623D 19016 bytes
SHA-256: 6d74d6d92ac3a2d165d3930cbe6c12422e77a28a0aedc221a503dbf50d6b2c8a

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