Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb3e90e26ea4b34a…

MALICIOUS

PDF

45.0 KB Created: 2021-05-15 05:38:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 2e470bda7a33f739ca2d09bee6231bd3 SHA-1: 6fdbe216dc6f65bf868002bd98796035ab2bfd2a SHA-256: eb3e90e26ea4b34a1745f1abd98850f941cebe805fb38c9f858b983cfa84c870
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors and SEO link farms, masquerading as game hacks or free currency generators. The primary malicious URL identified is https://netcdn.xyz/app/406889139/free-spins-coin-master-2021-hack-game-hack. The document body and heuristics indicate a lure designed to redirect users to potentially harmful content, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/406889139/free-spins-coin-master-2021-hack-game-hack In PDF document text
    • http://infoagronomia.com.ar/images/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/how-do-you-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/free-robux-offers_GM431946152.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_off00004988.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4988 24408 bytes
SHA-256: c9237ff85f93425b158f855a751ec961da1c01c4955108c96d19260723a1a12e
font_01_sfnt_off0000816d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x816D 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00008c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C97 18456 bytes
SHA-256: a5560883dc18b22b6e1d4164516743640258d4849b8ee5f58e623da8a68570df

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