Malicious PDF — malware analysis report

Static analysis result for SHA-256 987bb45b171ef036…

MALICIOUS

PDF

34.2 KB Created: 2021-06-27 06:40:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d5a895c3fbd90c14286f9ffa7da483d3 SHA-1: b2f0a2c0c0ed2926365fa0d8563f91fe5b3831f7 SHA-256: 987bb45b171ef036e68b6cd43bb6e09eebf1ee9aa4e097b811aae06d5b5fa644
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to malicious redirectors and IP addresses, masquerading as game hacks and generators to lure victims. The document body and heuristics indicate a clear intent to redirect users to potentially harmful content, likely for further exploitation or malware delivery. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/case-clicker-roblox-hack-game-hack In PDF document text
    • http://202.56.165.220/digilab/repository/www-bandicam-com-free-robux_GM431946152.pdfPDF link annotation
    • http://202.56.165.220/digilab/repository/roblox-promo-code-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/roblox-how-to-look-like-a-hacker_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/roblox-yin-vs-yang-ninja-assassin-hack_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/roblox-free-radio-games_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/how-to-hack-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/free-roblox-bloxburg_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/roblox-hack-comment-avoir-de-largent-facilement-sur-jailbreak_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/coinmaster-com_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/roblox-restaurant-tycoon-free-money_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/roblox-2021_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_off00002fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE1 22328 bytes
SHA-256: f008def6c2ac85734267fade6f4ae92f31dca556f80069f06cd13180901238eb
font_01_sfnt_off00006182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6182 18776 bytes
SHA-256: 3e06e5df7a457b59833af9fb9f03422e68ed313e10f3c67f946695f256b5e5c9

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