Malicious PDF — malware analysis report

Static analysis result for SHA-256 916d31ba4d215ead…

MALICIOUS

PDF

51.4 KB Created: 2021-06-03 09:23:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 139191912c0c1f82eac43fb8bbcad439 SHA-1: b4efdc5203e908cb7e09e0e2bcd268cc08758d45 SHA-256: 916d31ba4d215ead5400e02067de839f1dbc33e543481618c921af345be726ab
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to malicious redirectors, disguised as "free generator" or "game hack" lures for popular mobile games. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful websites. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9685

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/406889139/how-to-get-free-spins-in-coin-master-game-hack In PDF document text
    • http://perpus.polimarim.online/repository/hack-coin-master-download_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/pubg-uc-redeem-code-midasbuy_GM1330123889.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/robux-codes_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/robux-only_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-hack-2021_GM431946152.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005377.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5377 24928 bytes
SHA-256: 38a6ebc9482b9994a6c30dd25d45921b33434a29dca64e7eaed421028e21ca09
font_01_sfnt_off00008cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC7 4628 bytes
SHA-256: 623c543ecc5b0033ee6f700f4a6515cf9ae8ac998acb149654a595c9ea9916a1
font_02_sfnt_off00009cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB4 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off0000a6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6A4 18052 bytes
SHA-256: 52b27d49d658c5dd219fe1685a79a71966a386845fdc62a41335e5719e4d5001

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