Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62d7d0f3ecf794e…

MALICIOUS

PDF

55.5 KB Created: 2021-05-11 00:01:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 10f15f754b1233d56906c99f180721f7 SHA-1: 7eacc0e5636baf20fe550c054e57be0b219e2949 SHA-256: d62d7d0f3ecf794e2ee59e75298868759800cd5cce0d7130a1abce34e6fa70a8
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 0.8531

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/406889139/coin-master-links-to-free-spins-game-hack PDF link annotation
    • http://abst-brandschutztechnik.at/images/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/how-to-get-free-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/hack-robux_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/free-robux_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cfd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CFD 26288 bytes
SHA-256: 191b93ee3bf82cb172a3a8544e388ffa305b7da95fc6cf9498f0159eab248220
font_01_sfnt_off00008a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A91 3088 bytes
SHA-256: e7854aff7cbc8fbdeb85d2b3d6248d12dc820ede8a581f4eac107fa6446c2222
font_02_sfnt_off0000955c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x955C 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000a881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA881 18056 bytes
SHA-256: 38227f22c56e8db7fcd930f70334a55dc145d883d99f149f685c4c449ac5af35
font_04_sfnt_off0000c9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CB 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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