Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e1a98a4e329e50f…

MALICIOUS

PDF

44.6 KB Created: 2021-05-11 03:43:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 72c60231ed038f6c9b229292e8668248 SHA-1: dd55e689a551b1e8dbea3832a1860d67b1ccc522 SHA-256: 2e1a98a4e329e50fcc2e54e805f9bea22365c201d424952d4d8f3cec2d5ba502
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that are flagged as malicious redirectors, specifically promoting "free generator / game hack" lures. The document body and extracted URLs indicate a phishing attempt designed to trick users into visiting these sites, likely to download malware or steal credentials. The presence of numerous SEO-optimized PDF links further supports a malicious intent to distribute harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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.
  • 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/coin-master-spin-hack-2021-game-hack In PDF document text
    • http://acktivities.com/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://acktivities.com/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/robux-download_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://acktivities.com/images/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://acktivities.com/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a3b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A3B 30696 bytes
SHA-256: 111dd88bf89843b15bdb33f430df0093b6be9cf67c0a140175a84606e9043e27
font_01_sfnt_off00008bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCA 18296 bytes
SHA-256: eaa60ab3b9dbdc46d7aef4d77b4227c1d0aeb4180c3635ae77be6ae4ebf58c24

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