Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2e7074797f9df6…

MALICIOUS

PDF

54.7 KB Created: 2021-05-12 08:19:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0ecb2e008d2d14ab7632c817f103dfc3 SHA-1: 5ebca3794f39e54a0b7447d0b16b33b40018b9dc SHA-256: cc2e7074797f9df60449754d69d2026de02fa73ad919afb54e6fa843cd4bb032
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-hack-version-game-hack PDF link annotation
    • https://katalog.smkn1glagah.sch.id//repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/www-coin-master_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-group-free-robux_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_off00004c8f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C8F 25652 bytes
SHA-256: e276e725257b6fd2ee37bd2cb97cfeb04895b4f3d9c05b350751788c5bbd1277
font_01_sfnt_off00008832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8832 3088 bytes
SHA-256: e7854aff7cbc8fbdeb85d2b3d6248d12dc820ede8a581f4eac107fa6446c2222
font_02_sfnt_off000092fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92FD 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000a623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA623 17848 bytes
SHA-256: 2729ad92b050e6dc35a280ba208d99b8f0446e6618424513f217a7b9cdaff54a
font_04_sfnt_off0000c6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F3 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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