Malicious PDF — malware analysis report

Static analysis result for SHA-256 4979e89869a24766…

MALICIOUS

PDF

45.4 KB Created: 2021-05-10 16:33:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ecfaabbda8f15f4395e1391a4e3cf8ec SHA-1: 8b96463254f6199981ac770bf8ef27a90727d5eb SHA-256: 4979e89869a24766dac547245f1193f327eb0ed766649584b682b9b13a3a56b2
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically targeting themes like game hacks and free currency to entice users. The primary lure appears to be related to 'Roblox Fun Com Free Robux', directing users to a malicious URL. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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 https://netcdn.xyz/app/431946152/roblox-fun-com-free-robux-game-hack In PDF document text
    • http://pspmrsmbpj.com/opac/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/master-coin-hack-game_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A2 26160 bytes
SHA-256: 802b717c4eba21a69812aa064114e429d15fcbe98572356fca3962c32a01e597
font_01_sfnt_off00008536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8536 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00008ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE5 18348 bytes
SHA-256: 9560f0e6f9a4e6be006083e3696e79311a38bb173f302534750988b281bae61f

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