Malicious PDF — malware analysis report

Static analysis result for SHA-256 054a216a772d333d…

MALICIOUS

PDF

248.7 KB Created: 2021-07-06 20:26:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 740d5968eaa02508d4007d7d4b4c4ad9 SHA-1: ed7bceed0264f801df2aaa4a4d81b63c3345d9f2 SHA-256: 054a216a772d333df293d25f8919a167e2452a6c4b3c9b5d96cbbd296bebcff0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'game hacks' and generators. The primary malicious URL identified is http://netcdn.tw/app/1330123889/is-uc-pubg-game-hack. This indicates a phishing or scam attempt designed to lure users to potentially harmful websites. No scripts were extracted from this sample, but the embedded links are sufficient to classify the attack pattern.

Machine Learning

  • Nyx PDF Classifier clean score 0.0873

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/1330123889/is-uc-pubg-game-hack In PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-pet-simulator-cheats_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/cheats-for-bear-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/cheat-engube-55-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-anything-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-anything-on-roblox-for-free-easy-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/hack-para-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/is-roblox-virus-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-to-earn-robux-fast_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_024_off00037e75.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37E75 25928 bytes
SHA-256: 911fd574ca7255ee074047417959cb9e9b73e4d81ad91e3751b5220211da3667
font_01_sfnt_off0003bb96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BB96 18124 bytes
SHA-256: 0e67842f5017de9ec77ab6291ceb286db201fc62ac6de0b8ed9478cb8e3d5faa

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