Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ef9d7c33827f19b…

MALICIOUS

PDF

41.4 KB Created: 2021-05-19 07:27:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f7c92e3450281ec2c8b9b8b1fd5b8075 SHA-1: 909149e6d4ba303365d49031de98acbe221df3e3 SHA-256: 3ef9d7c33827f19b4c717f761561a63ffa1ebd4d9e027e6e644cd7f576634c42
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are identified as malicious redirectors or part of a link farm. The document body and heuristics suggest a lure related to game hacks and free currency, aiming to trick users into visiting these malicious sites. The presence of a 'password-protected archive' lure indicates a potential attempt to bypass security controls by encrypting a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/431946152/how-do-you-get-roebucks-game-hack In PDF document text
    • http://neumann.fr/images/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://neumann.fr/images/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://neumann.fr/images/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://neumann.fr/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://neumann.fr/images/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://neumann.fr/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://neumann.fr/images/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://neumann.fr/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://neumann.fr/images/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://neumann.fr/images/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://neumann.fr/images/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://neumann.fr/images/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://neumann.fr/images/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://neumann.fr/images/coin-master-hack-ios-10_GM406889139.pdfIn PDF document text
    • http://neumann.fr/images/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://neumann.fr/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://neumann.fr/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://neumann.fr/images/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://neumann.fr/images/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://neumann.fr/images/how-to-get-a-lot-of-robux_GM431946152.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_off00004645.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4645 25052 bytes
SHA-256: 2cecceb995042958566c58933542e23d4cddd019c8d2b32bfb60c5792016a40e
font_01_sfnt_off00007ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF0 18408 bytes
SHA-256: ff346f93049ac2d3fb32d8a2c4dbad06720bfee6e4c1cdd193d0bff0cdbf25c6

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