Malicious PDF — malware analysis report

Static analysis result for SHA-256 3255586a3993fa9e…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 04:32:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 89b1d6fa7be124285c8b325a5ec9fb1b SHA-1: e061fb98f44e3948908b4873fb726d3bc31d0cf1 SHA-256: 3255586a3993fa9e3c32bbc6fe479f4130204daac84c739cbe4508d8aac4558c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector leading to a 'game hack' lure. The document body and embedded URLs suggest a phishing attempt to trick users into visiting potentially harmful websites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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/minecraft-pocket-edition-free-ios-game-hack In PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/robux-gratis_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-today-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-codes-2021-july_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/exploit-free-roblox-not-win-rar_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30EE 22336 bytes
SHA-256: d276c5f2e19ef8ccf21e1b296c0b79ab465219c39a717d094bd6c8a33986aba7
font_01_sfnt_off00006299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6299 18496 bytes
SHA-256: 3c6ae5e4dac25ed89b3b11406d02397eb9bd8a528fb78df79ee848dfb7982bde

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