Malicious PDF — malware analysis report

Static analysis result for SHA-256 07142bec2469208c…

MALICIOUS

PDF

46.7 KB Created: 2021-06-04 06:14:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a2b7a9e930081c758f98c45b9874e6a5 SHA-1: 8caa094b147956a4c0117ca70818a1f9f76bdbbc SHA-256: 07142bec2469208c1acea24800326e349ad562198c7129f9ecacb71ecad77023
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 0.9748

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/coin-master-hack-ios-no-jailbreak-game-hack PDF link annotation
    • http://e-library.akbid-purworejo.ac.id/repository/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/freerobux-co_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/add-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn 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_004_off000051dc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51DC 25284 bytes
SHA-256: 4b36cdffe542b2c21d127506a4ed54d786b3faa8162e2130044302ce814faaa2
font_01_sfnt_off00008a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7D 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9430 18112 bytes
SHA-256: 0b3ca5face5facb5c3ab82e5b9d367123ba9b47c1b773fe7253bb83fe1962477

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