Malicious PDF — malware analysis report

Static analysis result for SHA-256 da3ab014f91dccaf…

MALICIOUS

PDF

43.6 KB Created: 2021-05-14 02:32:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9b71915f8b1c2aadb755a2c791702ded SHA-1: 4ad139caf416df9625bfd425cd97f0697808893c SHA-256: da3ab014f91dccaf8a93be39fd03eea9b96f407c9834d2a8101f9177e65ebd84
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free Robux and game hacks to entice users. It contains a mass of external links, many pointing to a redirector infrastructure, which is indicative of a phishing or scam campaign. The document body and embedded links strongly suggest the intent is to drive traffic to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-robux-codes-not-used-game-hack In PDF document text
    • https://eleganceautospa.ca/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/robux-prices_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/coin-master-attack-block-hack_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/get-free-robux_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/my-roblox-avatar_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_off00004bb5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB5 25600 bytes
SHA-256: ee42eaebd70e9866ba377a5f0dfe2dae52ca65c926a0f609c0935ad9bcff0cfe
font_01_sfnt_off00008768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8768 18480 bytes
SHA-256: 5e8837c19f720dc17ec1b2cb74db859cfc03e356d736a46bae75ba097655ce21

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