Malicious PDF — malware analysis report

Static analysis result for SHA-256 6151968049f18bf4…

MALICIOUS

PDF

42.5 KB Created: 2021-05-17 20:22:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 91fdad92253dd2c911723bb95564a7ed SHA-1: 3565295ef991ae26cdad7c0e2ff160bacce5b6c4 SHA-256: 6151968049f18bf4456e5dfe5b8e54c38b648a21b252471e3d14c876a2b6b80a
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized to appear as game hack generators. The primary lure is to trick users into visiting these sites, likely to serve ads, phishing content, or download further malware. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/how-to-hack-coin-master-spin-ios-game-hack PDF link annotation
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/master-game_GM406889139.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/free-coin-master-spins-for-today_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b15.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B15 25068 bytes
SHA-256: 99cc21d0a70d188e14aa28099e54232d27eb048d5076d3c3f21b56262feecbe1
font_01_sfnt_off0000846e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x846E 18056 bytes
SHA-256: 53f47b5799dae006b4346a2eed5aba235b3af24a2c4343d13ea096ab027fb028

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