Malicious PDF — malware analysis report

Static analysis result for SHA-256 af58e14dc2ed768b…

MALICIOUS

PDF

43.5 KB Created: 2021-05-10 16:30:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d615494ccd9b650215e424aab101f993 SHA-1: f03fbbd72469f9a0609cabb35241682cce89b37a SHA-256: af58e14dc2ed768bd96504078e8efd84777a7e99984887f2c31f296472084b35
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to a known malicious infrastructure, specifically advertising 'free generator / game hack' lures. The document body and embedded links strongly suggest a phishing or scam attempt to trick users into visiting malicious sites. No scripts were extracted, but the PDF's structure and embedded links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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/431946152/freerobuxhack-us-2021-game-hack In PDF document text
    • http://allcenterdistribuidora.com.br/files/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://allcenterdistribuidora.com.br/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://allcenterdistribuidora.com.br/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://allcenterdistribuidora.com.br/files/free-robux-app_GM431946152.pdfIn PDF document text
    • http://allcenterdistribuidora.com.br/files/rape-simulator_GM431946152.pdfIn PDF document text
    • http://allcenterdistribuidora.com.br/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://allcenterdistribuidora.com.br/files/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://allcenterdistribuidora.com.br/files/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://allcenterdistribuidora.com.br/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://allcenterdistribuidora.com.br/files/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://allcenterdistribuidora.com.br/files/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • http://allcenterdistribuidora.com.br/files/what-is-robux_GM431946152.pdfIn PDF document text
    • http://allcenterdistribuidora.com.br/files/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://allcenterdistribuidora.com.br/files/roblox-comroblox_GM431946152.pdfIn PDF document text
    • http://allcenterdistribuidora.com.br/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://allcenterdistribuidora.com.br/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://allcenterdistribuidora.com.br/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://allcenterdistribuidora.com.br/files/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://allcenterdistribuidora.com.br/files/roblox-sued_GM431946152.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_off000047e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47E4 27288 bytes
SHA-256: 55c3216c292da0c6781c4a166c6c95ba9cb30aa97f59586d7815e8dc821741d0
font_01_sfnt_off00008564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8564 19168 bytes
SHA-256: efb3faf8613e574aaafbc2c03eecac9d279c27a31d34e4d9725215b9c75db868

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