Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e6a45023751f3d…

MALICIOUS

PDF

38.1 KB Created: 2021-06-19 17:36:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a1bf1e30f675fa37da64209ed58c6379 SHA-1: bbfc1bc6765249b755d224a047f2242d21344104 SHA-256: 67e6a45023751f3da656f557558a0d0e4875e156f2319c180880d22b1f49a520
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to malicious redirectors and IP-based URLs, masquerading as generators for game currency and hacks. The document body and embedded links strongly suggest a phishing or scam attempt to lure users to download further malicious content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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-account-on-roblox-with-robux-and-bc-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/cheat-engine-roblox-mac_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/free-tiktok-followers-no-human-verification-2021_GM835599320.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-any-roblox-game-using-javascript_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-script-roblox-and-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-fashion-frenzy-game-free-online_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/comment-avoir-de-largent-hack-sur-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-bandit-simulator-codes-new-hacker-update_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-roblox-without-a-app_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-promotion-codes-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-admin-panel-robux-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-use-every-music-you-want-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-tiktok-accounts-and-passwords_GM835599320.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/tiktok-free-book_GM835599320.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/easy-robux-hack-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/como-hackear-robux-en-roblox-con-cheat-engine-66_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-studio-free-robux_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
font_00_sfnt_off00003bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BC4 22720 bytes
SHA-256: 778d00fd912dbf25518421a0d5567f177c5cce4e8a1cfe0db4d4d8e3ea395a65
font_01_sfnt_off00006ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBB 19552 bytes
SHA-256: 632fa6a5992daca5847b3211e10accb3fe53f50dc7753e4782b0c2511bcb8303

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