Malicious PDF — malware analysis report

Static analysis result for SHA-256 967892b720c12acf…

MALICIOUS

PDF

43.4 KB Created: 2021-05-15 23:00:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5f1813830abe130f00a6c6a81b219b3e SHA-1: 7fbc9c08978292ed22e49095cc4cb042565621cc SHA-256: 967892b720c12acfb4d72863ec1e0cd580f149172319193c10a969f86e676309
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 0.9969

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/479516143/is-minecraft-dungeons-free-game-hack PDF link annotation
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/free-coin-master-gift-link_GM406889139.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/coin-master-game-android-free-download_GM406889139.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-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/free-spins-and-coins-from-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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d87.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D87 25252 bytes
SHA-256: 8339a5bff1ab60fac20264572f48c90190c8c753060a8d899670b1e14b0c8e63
font_01_sfnt_off00008732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8732 18304 bytes
SHA-256: ce690126d5ef6938f3c3401fec90eb29b657d34ca06495398573f2a883063706

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