Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8a20814e79b270…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 10:25:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: af1ff83fd1a0c862f078e85db1dd7913 SHA-1: ddd69538c802db49d873c9b470f114ad17e9c833 SHA-256: 2f8a20814e79b270ae4d0c97dce1c381c2f72a5e8b895355973fd677af6e0b5d
122 Risk Score

Malware Insights

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

The PDF contains a link disguised as a 'free generator / game hack' lure, which is a common social engineering tactic to trick users into visiting malicious sites. The 'SE_CLICKFIX' heuristic indicates the document instructs users to run commands, further supporting a malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to exploit user curiosity for malicious purposes, likely leading to a second-stage download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.online/app/479516143/minecraft-free-version-pc-game-hack PDF link annotation
    • http://digilib.iailm.ac.id//repository/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-free-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robux-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/pubg-uc-qiymtlri_GM1330123889.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-hack-no-robot-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coinmasterfreespins_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_004_off0000556a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x556A 25092 bytes
SHA-256: 9aad9292e07f41aed7c2f8da2f0bf0a074e9b7b92896de122090c9bad9da9495
font_01_sfnt_off00008ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF5 18000 bytes
SHA-256: 596bbbc5b74f8f8d5f8cfb941eefd0324f2b497cb668fe7d549b39bc00e1e0cd

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