Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa2aee11e5d55c2…

MALICIOUS

PDF

46.7 KB Created: 2021-05-15 16:05:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 14e6e8abbbc64edc2c016ee406a131e0 SHA-1: 13be8cc3a9ed2551fd0db030e1e44719fd462000 SHA-256: dfa2aee11e5d55c2f7f2977fd3ee534b767c8ffedb22a87a9ddd9b04c2be7963
200 Risk Score

Malware Insights

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

This PDF document employs a lure of free game currency and hacks, presenting a fake CAPTCHA to trick users into clicking malicious links. The embedded links redirect to potentially harmful sites, suggesting the document is part of a phishing or scam campaign. No scripts were extracted, but the document's structure and heuristics indicate it's designed to lead users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-group-free-robux-game-hack In PDF document text
    • http://progressgel.ru/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://progressgel.ru/images/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • http://progressgel.ru/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://progressgel.ru/images/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://progressgel.ru/images/coins-master-hack_GM406889139.pdfIn PDF document text
    • http://progressgel.ru/images/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://progressgel.ru/images/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://progressgel.ru/images/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://progressgel.ru/images/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://progressgel.ru/images/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • http://progressgel.ru/images/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://progressgel.ru/images/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://progressgel.ru/images/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://progressgel.ru/images/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://progressgel.ru/images/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://progressgel.ru/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://progressgel.ru/images/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://progressgel.ru/images/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://progressgel.ru/images/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • http://progressgel.ru/images/free-minecraft-skins_GM479516143.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_off00004681.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4681 27400 bytes
SHA-256: 4348733323eae7dc9699907584d811c73061858496f67ab676ec5437f19d1e5e
font_01_sfnt_off0000843d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x843D 6636 bytes
SHA-256: 62075f0fe13502d46afb6e55e83d440c29ef4988399537df1f86e7653ce3b744
font_02_sfnt_off0000944a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x944A 18264 bytes
SHA-256: b2792b9995997ff68e5dfa2acea2bbc639d657441038e216f117c3302624ca62

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