Malicious PDF — malware analysis report

Static analysis result for SHA-256 53aef891e860af7b…

MALICIOUS

PDF

35.5 KB Created: 2021-06-25 18:43:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c5d15e59c80c085fcb3f826fb1b527c6 SHA-1: 669065d238e5e89dc3767926fa4f03b82ea87bab SHA-256: 53aef891e860af7b649cacb9260839b88f22105481493afd0ef8dc7dfec87c02
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document employs a common lure of free game currency or hacks to entice users to click on links. The primary link directs to a known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.co/app/431946152/follow-button-gives-free-robux-game-hack In PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/red-roblox-shorts-free_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-to-get-free-coins-in-roblox-bandit-siimuator_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/cheat-roblox-android_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-robux-generator-no-survey-no-verification_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/roblox-free-online-unblocked_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-robux-edit-html_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-free-robux_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-spins-for-coin-master-2021_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
font_00_sfnt_off000032d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D8 22516 bytes
SHA-256: 2703ddfc4c0b0f05d068145a86973e08678c6b1fdd6ccaeeb107cc01c76ad8c1
font_01_sfnt_off00006518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6518 19292 bytes
SHA-256: d0900c977bab3aa7994cbb56e8962be27df3bb93751ccf184f5d78f95bbdfa9b

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