Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f432a58c75be46c…

MALICIOUS

PDF

35.7 KB Created: 2021-06-29 12:48:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 50e084d1abc74ed7b6bfddc7fc4c2fc0 SHA-1: 4cadce7d4c1f6c8b1ab0325ce31e7283537b78cb SHA-256: 1f432a58c75be46c7eaa686b5101883e83e4cb144f5bdd10dcb866c88eac677f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector, that lure users to sites offering game hacks and free items. The primary malicious URL is http://netcdn.co/app/431946152/free-roblox-wing-skins-game-hack, which is likely part of a phishing or scam campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at driving traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-roblox-wing-skins-game-hack In PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/infinite-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/tiktok-free-movie-website_GM835599320.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-free-robux-trick_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-roblox-place-visits_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/rbx-roblox_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-welcome-to-bloxburg-cheats_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-coin-master-cards_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
font_00_sfnt_off000034bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34BD 22220 bytes
SHA-256: 9fec939522c27a4ee9c7b6ee99a83e691685fe3712d0dc9a2fda65f363f40b37
font_01_sfnt_off00006628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6628 19136 bytes
SHA-256: 731f2d665fd0bec6ca73d62e04969cbdbdd608aba03267938f7129f45202597e

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