Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc7b59dd619e1930…

MALICIOUS

PDF

44.9 KB Created: 2021-06-11 10:35:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b9a1af1f773c0b3eae25809152122520 SHA-1: 53a10ecab3355c332c8abbb379172d73fb9842d5 SHA-256: dc7b59dd619e1930f51e606c8ba9f98fa83420e4e9b0d537972f6a4f9b2e685a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links to external websites, many of which are structured as SEO-optimized PDF links. The document body and extracted URLs suggest a lure for free in-game currency or accounts, a common tactic for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/robux-money-for-free-game-hack PDF link annotation
    • http://elitesoftsolutions.com/images/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/free-roblox-accounts-for-gampass-for-ultimate-driving-simulator_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/roblox-lumber-tycoon-2-i-cheated-for-this-box_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/pubg-uc-lebanon_GM1330123889.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/roblox-real-hack-robux-real-encrypted_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/roblox-comcom_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/games-like-coin-master-for-free_GM406889139.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
font_00_sfnt_off0000538a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x538A 25788 bytes
SHA-256: d3bdc17abda1ffcc4d17f57d4a1973408bae15be053b1e7466a708604042d30c
font_01_sfnt_off00008ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE2 18388 bytes
SHA-256: 458c9cbda29c8474acd09563013ab3fffbea76d9c2063b5bf0e6f44fdfec7b0d

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