Malicious PDF — malware analysis report

Static analysis result for SHA-256 720066f5ef24c047…

MALICIOUS

PDF

41.6 KB Created: 2021-05-19 12:47:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a67d5374ed2252749001d8df0a4a31ca SHA-1: 3790737842961bb365e891cb3b4ed1a074e0b09d SHA-256: 720066f5ef24c0479daefaf1f5633ac2c9657baa983d373ceb3a1c064fd2d68e
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external sites, including a malicious redirector and a large number of SEO-optimized PDF links, all related to game hacks and cheats. The document body and extracted URLs suggest a lure for users seeking in-game advantages, likely leading to further malicious content or scams. No scripts were extracted, but the overall structure and content strongly indicate a phishing or scamming attempt.

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/1330123889/offer-for-pubg-uc-game-hack In PDF document text
    • http://teksomak.com/images/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • http://teksomak.com/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://teksomak.com/images/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://teksomak.com/images/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://teksomak.com/images/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • http://teksomak.com/images/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://teksomak.com/images/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • http://teksomak.com/images/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://teksomak.com/images/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://teksomak.com/images/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://teksomak.com/images/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://teksomak.com/images/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://teksomak.com/images/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://teksomak.com/images/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • http://teksomak.com/images/roblox-rules_GM431946152.pdfIn PDF document text
    • http://teksomak.com/images/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://teksomak.com/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://teksomak.com/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://teksomak.com/images/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://teksomak.com/images/coin-master-hack-mod-apk-free-download_GM406889139.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
stream_003_off0000477e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x477E 24768 bytes
SHA-256: 5eb4de0b29f0548a8660f9e165090c7761b104546c7339ed10f363bf1c61a96d
font_01_sfnt_off00008074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8074 18204 bytes
SHA-256: c2f9b982ce16f489dd0f16cb5134332e6d2f12885600d4382dc1065284033d6e

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