Malicious PDF — malware analysis report

Static analysis result for SHA-256 103e6448e8d8283e…

MALICIOUS

PDF

47.8 KB Created: 2021-06-03 05:19:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 94d1da5d6fc7f314a4ec06f27605331e SHA-1: 1a1a877293569fd421ba87d4ccdb1a2f07ba612f SHA-256: 103e6448e8d8283e0f4ec6ba90265a08fbc67f11646669f2d1d1447205965e26
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are part of a link farm designed to attract search engine traffic. The primary link leads to a known malicious redirector that ultimately points to a 'game hack' generator. This suggests the document is a lure to drive traffic to potentially malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/406889139/coinmaster-blogspot-game-hack In PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/pubg-uc-at-cheap-price_GM1330123889.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-free-spins-iphone_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_004_off0000516f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x516F 25788 bytes
SHA-256: 0b341fb89225dee3aa16bc4f5b7e74be19d73cd89479dd062603fff13311729d
font_01_sfnt_off00008d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D52 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000973d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x973D 18560 bytes
SHA-256: b6c1a4b4a396e514168379159069ddcbbdb2f4734aa5f4f24f50e1de42ff982a

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