Malicious PDF — malware analysis report

Static analysis result for SHA-256 c481d1a544242efa…

MALICIOUS

PDF

35.7 KB Created: 2021-06-29 03:09:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5b73fa4ee7e19a3b17b14803be381685 SHA-1: 098874fc96950237dde4fd2e65fb1249c77685f5 SHA-256: c481d1a544242efafbe3b6f80def5c78a74dcb6ce8c9af448027f96936a6b2a3
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is designed to lure users into downloading potentially malicious scripts by offering 'game hacks' or 'free items'. It contains numerous links to external PDFs, many of which are SEO-optimized and lead to redirectors or further download pages. The primary malicious link identified is http://netcdn.co/app/431946152/hacking-script-download-roblox-game-hack, which is flagged as a known malicious redirector. The document body, though partially corrupted, contains similar lures and URLs, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/hacking-script-download-roblox-game-hack In PDF document text
    • http://lib.stimykpn.ac.id//repository/wizard-hacks_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-do-you-get-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-roblox-comment-passer-a-travers-des-murs_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-synapse-x-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-accounts-robuxian_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-jailbreak-how-to-get-bugatti-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/the-neighbourhood-roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/new-roblox-hack-exploit-for-murder-mystery-2_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-cn-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/click-for-free-robux-png_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-giveaway-xyz-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-look-like-a-hacker-in-roblox-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/games-like-coin-master_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_off000033f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33F3 22088 bytes
SHA-256: e03c8eabbbb274c7db076e334f5fd515cc2f2bebe0761303dc35bf06f00affb2
font_01_sfnt_off000064c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C6 19564 bytes
SHA-256: b74bf994eae1965bb619d37f5123cb750cfd92f1543ce19634c20055d5dc9434

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