Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b3c5085f38bbd4…

MALICIOUS

PDF

43.0 KB Created: 2021-06-03 09:23:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6120ada1dd2b7057dda20e9251255e10 SHA-1: 6c2b0494b7e41257bf71b5944f3eef765d2a0e64 SHA-256: 12b3c5085f38bbd44201708618e955b6cfe6ef2f73ba1f193674c82c12199f74
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a malicious redirector pointing to a "free generator / game hack" lure. The presence of these links and the ML classifier's high confidence score indicate a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, aligning with T1059.007 as a potential mechanism for delivering malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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/1094591345/pokemon-go-free-zone-game-hack In PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/hack-coin-master-download_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-spin-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/rbx-com_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-premium-free_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_004_off00004f88.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F88 24308 bytes
SHA-256: 4818426ca5fe9b0810a120ed2ba0b3ee07634583ca1638092ab33016e1eaca85
font_01_sfnt_off000086dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86DD 17936 bytes
SHA-256: 9318d418dc25fa0fe1ea1159b572aec808db1c83134eb41ca87f6debc8fcb312

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