Malicious PDF — malware analysis report

Static analysis result for SHA-256 c84ef1c2213ec803…

MALICIOUS

PDF

45.0 KB Created: 2021-05-11 03:11:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 04c0cbb7dbe6f4549eaa3cc271f30ef5 SHA-1: fd246b61fec83c1a5bf3a4b308f5d02f7145ae25 SHA-256: c84ef1c2213ec803d02f7a03c2d496e82aa1f1aa3be52fee3dd7c5782822306a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and free currency. The primary lure is a link to 'netcdn.xyz', which is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick users into visiting potentially harmful sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/blogger-coin-master-free-spins-game-hack In PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/play-coin-master_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/free-robux-site_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/buy-robux-free_GM431946152.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_003_off000049bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49BC 25432 bytes
SHA-256: 2947412c7d43af345671076332cbd4573b7ad26ff8166799da8a5e9a18e367b1
font_01_sfnt_off00008312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8312 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off00008cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB5 18464 bytes
SHA-256: 0911799b9aa5b6ecf8f75e1ae71094da345a4ed5579c86b7800e8f9c3f9f610d

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