Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aef4c656cba3f2c…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 13:25:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b776b93628c6515024e22ef39a9c481f SHA-1: 4233882c9a42f5adb94b5130fc280e95970f254c SHA-256: 5aef4c656cba3f2c83367121acf497811c749f5a5c251333145e04513bd19e1e
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appears to be a "free generator / game hack". These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The document body and heuristics strongly suggest a social engineering pretext to drive traffic to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.tw/app/406889139/how-to-get-free-skins-on-coin-master-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-home_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/https-wwwfree-robux-at-http-rex-eu5org_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-often-pubg-uc-benefits-paid_GM1330123889.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/robux-hacks-on-computer_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-hack-explot_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/babe-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/inspect-element-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-dominus-for-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-spiderman-mask-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/robux-best_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/can-pokemon-go-free-account_GM1094591345.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-hacks-on-midieval-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/oprewards-com-earn-free-robux_GM431946152.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_002_off0000320e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x320E 22648 bytes
SHA-256: 123fa5cc17a2fbfcf72d80bc734bde6328b5f73d6404040f90e288e964555972
font_01_sfnt_off000064b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B3 18332 bytes
SHA-256: add889a94660e7441b2b849688d5b5041293811e8c73c1b2aa9120b2671bcd00

Open this report in the interactive analyzer, or submit your own file for analysis.