Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1f544e1f711543a…

MALICIOUS

PDF

42.6 KB Created: 2021-05-16 23:38:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a8fb9a16ab189b441e733dfe49078497 SHA-1: cbb085c2900693f2d87fd10e544b7748f5bd7f36 SHA-256: a1f544e1f711543a9747a82aa45ec8102ea30cf63147c965747589bd513b69f4
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to external websites, many of which are related to game cheats and hacks, indicating a lure for users. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm heuristic further supports its malicious intent. The document likely serves as a phishing or malware distribution vector by directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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
  • 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/431946152/roblox-group-free-robux-game-hack PDF link annotation
    • http://prazdnik-kzn.ru/images/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/coin-master-hack-software-download_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000468f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x468F 28660 bytes
SHA-256: dc42ca134db8c609d5b97376a96475c02331efc3224bc274dee0a1351ca9bbb5
font_01_sfnt_off0000844f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x844F 18264 bytes
SHA-256: b2792b9995997ff68e5dfa2acea2bbc639d657441038e216f117c3302624ca62

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