Malicious PDF — malware analysis report

Static analysis result for SHA-256 17961a8c1a347de1…

MALICIOUS

PDF

43.6 KB Created: 2021-05-14 20:17:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ee2d6d88df057a91e1475f024a6bf224 SHA-1: c8c08484540908953c7b302b68dd1767b6ad843f SHA-256: 17961a8c1a347de12046cbb7220ce0a48a7040b5816a72aebf0db91f8c793209
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically disguised as game hacks and generators. The document body, though partially corrupted, contains text related to 'free hair on Roblox' and a URL matching the malicious findings. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring the user to click a malicious link, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/how-to-get-free-hair-on-roblox-game-hack In PDF document text
    • http://vedrachemicals.ro/images/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/robux-download_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/offers-for-robux_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a09.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A09 26764 bytes
SHA-256: 123df7371ba931e814dd12d48b96576761bc33c0abd7a898b6fd1a39a687aaa4
font_01_sfnt_off00008750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8750 18564 bytes
SHA-256: 5a3a34d59f38cc9f1040a775a8b0b3209628c8e6969c263c79e17d91d7f1d7f9

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