Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f64160d47af67d…

MALICIOUS

PDF

53.4 KB Created: 2021-06-03 22:36:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1794fafaab87e4195e3844efa9918f37 SHA-1: ac26970f7fd0315e49d72a3203a2f44774a08550 SHA-256: f2f64160d47af67d565cf10aa5d9e58ec6454cec19a2227a8413e1cad7bab0fd
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector lure, specifically targeting users with promises of free game currency. The document body and embedded URLs point to a site designed to trick users into clicking through to a malicious domain. While no scripts were explicitly extracted, the PDF structure and the nature of the lure strongly suggest an attempt to lead the user to a malicious site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9616

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.online/app/431946152/free-2021-robux-game-hack In PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/no-human-verification-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/robux-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-instantly_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000054db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54DB 26272 bytes
SHA-256: 1948b590993843f4c20dfe4433083d68ca89a65d73fe80b2184308aef702a455
font_01_sfnt_off000092d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92D9 8300 bytes
SHA-256: db1813867f3e4dd58445d0999903dd4e04a15bf3251217fcb690212a65572ded
font_02_sfnt_off0000ae00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE00 18416 bytes
SHA-256: 24dd33113ad1920a4b79572916f2875f9d05bd64d95cc44e0cd438e20c1ad4df

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