Malicious PDF — malware analysis report

Static analysis result for SHA-256 a055d6ff5dc5886e…

MALICIOUS

PDF

45.4 KB Created: 2021-05-19 13:34:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 0ebe6479ea4a65ecd3070a25a6c9c88f SHA-1: 09c37319c0593b2ceab023bc9b440aa0c37050fe SHA-256: a055d6ff5dc5886e59ae51a91629cc5df836709b870d8efce47941654fcf2102
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which are part of a link farm designed to attract users with lures related to game hacks and free items. The primary redirector URL, https://netcdn.xyz/app/479516143/minecraft-cheats-pc-2021-game-hack, is flagged as malicious. The document body and embedded links suggest a social engineering tactic to drive traffic to potentially malicious or ad-filled pages. No scripts were extracted, but the overall structure and linked content indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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-cheats-pc-2021-game-hack In PDF document text
    • http://immo360grad.com/images/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/robux-offers_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/pokemon-go-free-things_GM1094591345.pdfIn PDF document text
    • http://immo360grad.com/images/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004acd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ACD 26208 bytes
SHA-256: 9978bef68501bd1b94bbddc66dee211d3bf10cc6365aeb32d33a315ef7a7d738
font_01_sfnt_off00008563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8563 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off00008f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F02 18292 bytes
SHA-256: 2d037195ba652ec1c948f4cf72bc757aedb522eec45588ee568a5b79e45c6912

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