Malicious PDF — malware analysis report

Static analysis result for SHA-256 a82daffa93b698a8…

MALICIOUS

PDF

33.7 KB Created: 2021-07-07 22:52:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 84aa0604ade50fd99f1fc0a81dae19ca SHA-1: 1ad911c1e077fe18873fb0e5fb85cfdd498872c5 SHA-256: a82daffa93b698a86b327b57bdb7545f1dedc33994bd51f795d930b28bce63a5
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks, a common social engineering tactic. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest the document is designed to lead the user to a malicious site, likely for further exploitation or credential harvesting.

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.tw/app/479516143/hacker-minecraft-song-game-hack In PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-nl_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/gamekit-didnt-give-me-free-800-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/nazi-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-website-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/ho-wto-get-robux-no-hack-or-anythong-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-roblox-scripter_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-adopt-me-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-hack-roblox-with-v3rmillion_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/funny-free-roblox-stuff_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/codes-for-skyscraper-tycoon-roblox-that-give-free-money_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/candy-ice-cream-simulator-roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-spin-coin-master-2021-link_GM406889139.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
font_00_sfnt_off0000304f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304F 22356 bytes
SHA-256: 037edfeacc0f96a73c8b60e7e621c14e7112ff4686334969d60347a6c46300e8
font_01_sfnt_off00006174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6174 18168 bytes
SHA-256: 37e3c409e679a213a10e0592b8ff177cf348fa9834d19b03b17241e7ed0c948b

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