Malicious PDF — malware analysis report

Static analysis result for SHA-256 9333e9d782268a01…

MALICIOUS

PDF

45.8 KB Created: 2021-05-11 07:44:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ada0f57409b89de8f0be91ea1d32fb1c SHA-1: 0377902c27183ce71c9d480b63c78bbc5be35fa3 SHA-256: 9333e9d782268a01618b72cf300f9763f6d552db3d733b1df5751bc2ccf52731
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 0.9432

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.xyz/app/479516143/minecraft-svg-free-game-hack PDF link annotation
    • http://techmobil.pl/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://techmobil.pl/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://techmobil.pl/images/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://techmobil.pl/images/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://freegiftcodes.euIn PDF document text
    • http://www.freenom.comHeyIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a84.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A84 26364 bytes
SHA-256: bcd30b999724ceacd4adb706d74ae74accbad1f4f09ba4d5f804978da6837589
font_01_sfnt_off00008750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8750 2972 bytes
SHA-256: 36a18b3a24802ee17b85002b0ea31972f6f870ac95fd4c2bea1ce57ba278c62c
font_02_sfnt_off0000919c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x919C 17968 bytes
SHA-256: f82c060a5662ddcca675aec0cfac04b32032cde6baf3a8524f802f6fcb7e6d40

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