Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9da80d037a8f7d…

MALICIOUS

PDF

45.5 KB Created: 2021-05-19 22:04:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6d5d00eec05f5d327fe9acc3f70ba46b SHA-1: 1a4cbf8c2b6b61f90334d6bd5cd51b4cca2c4080 SHA-256: 1e9da80d037a8f7de0c772fc51a947c2dc73e689c358e2490afaea34e4084baa
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appear to be game-related hacks or generators. These links redirect to malicious infrastructure, specifically a URL associated with a 'free Roblox groups with funds game hack'. The document also contains a large number of links to other PDFs, likely part of an SEO spam campaign. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/431946152/free-roblox-groups-with-funds-game-hack In PDF document text
    • http://ltmphoto.com/images/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • http://ltmphoto.com/images/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ltmphoto.com/images/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://ltmphoto.com/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://ltmphoto.com/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://ltmphoto.com/images/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://ltmphoto.com/images/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://ltmphoto.com/images/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ltmphoto.com/images/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://ltmphoto.com/images/roblox-com-www_GM431946152.pdfIn PDF document text
    • http://ltmphoto.com/images/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ltmphoto.com/images/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://ltmphoto.com/images/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://ltmphoto.com/images/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • http://ltmphoto.com/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://ltmphoto.com/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ltmphoto.com/images/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://ltmphoto.com/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://ltmphoto.com/images/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://ltmphoto.com/images/10-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AAD 24648 bytes
SHA-256: 96a5482974da4e7f5b4098e45dfd4516ceea2baef4c19c1e508dcd9c75101dc8
font_01_sfnt_off00008397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8397 2844 bytes
SHA-256: a66b570a908761b39e6d9e18bcb667c353840a86c6a7db528f79d01abe6b23a1
font_02_sfnt_off00008d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3D 19028 bytes
SHA-256: 3400496694c4b95422a50533d9ab07e9ced2fd8b85931bd61225c3b69c3e3d7c

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