Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e341250936cb95c…

MALICIOUS

PDF

47.2 KB Created: 2021-06-04 05:14:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e096b1e23cb47948c0ce8908fd7fb3ed SHA-1: f1fa8e4aa1bb8ed037e73a3da5d28a9e7bf4a818 SHA-256: 0e341250936cb95ca6f19ff704cafab69ef27f5d97082b3012b5c9e068074446
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 0.9769

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.online/app/406889139/how-to-get-free-spins-on-coin-master-2021-ios-game-hack PDF link annotation
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/coin-spin-link_GM406889139.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/robux-only_GM431946152.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000525d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x525D 25124 bytes
SHA-256: a071ea1c4a7e62c863c125f554bd0e690ba6f9faf48b79ac64cc199c2329fff8
font_01_sfnt_off00008b36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B36 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9521 18452 bytes
SHA-256: 1a65c7fcb9bad972bd4806159ebd9204317f4feb10db53d1e42ac086b2fa499a

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