Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf259e96a1cae19…

MALICIOUS

PDF

44.6 KB Created: 2021-06-09 16:15:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 77af5f822694b004bf078715cda1047e SHA-1: a98b9c091a1749b164f66aca9b87fbaca63d0b03 SHA-256: cdf259e96a1cae19ef44cc089f5e89b1553d93573288765ac1ae4e69cab1e4eb
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. 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 0.9865

Heuristics 5

  • 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.
  • 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 https://netcdn.tw/app/431946152/how-to-get-free-robux-legallz-game-hack PDF link annotation
    • http://katalog.ireyogya.org/repository/admin-command-for-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-hack-roblox-accopunt-passowrds_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/pokemon-go-free-raid-pass_GM1094591345.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/pokemon-go-free-qr-code_GM1094591345.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/more-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-spins-hack_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
font_00_sfnt_off00004edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EDB 26488 bytes
SHA-256: 1fade1f9b7078f2ef44a1227815c561f7edf70135054e95b8e73892deae24367
font_01_sfnt_off000089a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A9 18952 bytes
SHA-256: 73e3276f0a271058a70e4239934aa93cadd264fa30bcd6812ef6522fb99694a1

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