Malicious PDF — malware analysis report

Static analysis result for SHA-256 834756b1a46c4743…

MALICIOUS

PDF

43.4 KB Created: 2021-06-04 05:23:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 829cfac55876cd784a16385eb3587cec SHA-1: 27032e672bade4e7048fcf5d0c567ce9297cb8f3 SHA-256: 834756b1a46c474347fca147a53c28fb6241d9d82f5a7854e9526e4659873c13
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as 'free generator' or 'game hack' sites. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure itself facilitates these redirects, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/835599320/tiktok-fans-free-game-hack In PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/114-4-hacks_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/wurst-112_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coins-master-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-download-ios_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
stream_004_off00004c3a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C3A 26600 bytes
SHA-256: deea86ebab2d52496a1ce2e03a7fb83edc6e1abb806eb6d9c3a776e7c78571fa
font_01_sfnt_off000088a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A7 17684 bytes
SHA-256: 22325babc2251f8239949cad6d45cc43a88f66264b3c8ea65c603fce63084c3f

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