Malicious PDF — malware analysis report

Static analysis result for SHA-256 595adb37f0095d93…

MALICIOUS

PDF

43.0 KB Created: 2021-05-10 21:07:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b281de25e126a23a4f07c53be15db960 SHA-1: 36a9835be41727cd41bd3c5611f6945ecc69a3f4 SHA-256: 595adb37f0095d936a182965355dab8776aa826eff805b0a0e8d245214c221ba
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites that are identified as malicious redirectors and part of a link farm. The document body and embedded links suggest a lure for game hacks and cheats, aiming to trick users into downloading potentially malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/minecraft-pe-hacked-client-download-game-hack In PDF document text
    • http://samfora.de/images/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • http://samfora.de/images/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://samfora.de/images/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://samfora.de/images/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://samfora.de/images/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/robux-free-c_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://playhack.in/minecraftIn 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_off00004a8d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A8D 25280 bytes
SHA-256: 224c69acb0ad5c3cfa40d04591d4eb5a162d219043f57370be9791624a17ffee
font_01_sfnt_off000084f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F3 18616 bytes
SHA-256: ebc8f63742d735bd0d5fcc01e6dc1173a6a34174957216cae8456d8712615b4b

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