Malicious PDF — malware analysis report

Static analysis result for SHA-256 57fac3ce47f49433…

MALICIOUS

PDF

48.6 KB Created: 2021-05-14 10:05:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0650eb8d5d0c3398bfdedde0db8870f4 SHA-1: 989c1de13eb591608caaa920c408d4553ce2d25b SHA-256: 57fac3ce47f49433e0a1b4b23afb39767832532a65abcccb8337349cb12487fc
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of external links, many of which are SEO-optimized and point to sites offering 'free' game currency or hacks. The document body explicitly mentions 'Get Free Spins Coin Master 2021' and includes a URL to a similar resource. The presence of a 'Recovery secret / private key request' heuristic suggests a potential attempt to phish for sensitive user credentials, further reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/get-free-spins-coin-master-2021-game-hack PDF link annotation
    • http://farmaciaisella.it/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://farmaciaisella.it/images/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://farmaciaisella.it/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://farmaciaisella.it/images/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://farmaciaisella.it/images/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://farmaciaisella.it/images/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://farmaciaisella.it/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://farmaciaisella.it/images/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://farmaciaisella.it/images/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • http://farmaciaisella.it/images/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://farmaciaisella.it/images/robux-free-c_GM431946152.pdfIn PDF document text
    • http://farmaciaisella.it/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://farmaciaisella.it/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://farmaciaisella.it/images/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://farmaciaisella.it/images/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://farmaciaisella.it/images/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://farmaciaisella.it/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://farmaciaisella.it/images/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://farmaciaisella.it/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://farmaciaisella.it/images/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004925.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4925 25488 bytes
SHA-256: 336ec9096a20f7c0de2e37c850ffacc6ae47bdde7d4618ea0f68b642aac5a21e
font_01_sfnt_off0000838c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x838C 4076 bytes
SHA-256: 72edb3297646360b86480160291aea528a7dfc74a3cb5ea38ac61dd9ec3dd6c2
font_02_sfnt_off00009151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9151 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off00009b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B40 18288 bytes
SHA-256: b38ddf3080d7f2bc752da259c3b03eae0df146b085052c6419baf797dcf0dadb

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