Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c94cc02b30a728b…

MALICIOUS

PDF

50.7 KB Created: 2021-06-10 21:23:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d71cdebff572165816aa1ba639571819 SHA-1: d95b1b8da20eaea633a5252add7f7ba41edf33e9 SHA-256: 5c94cc02b30a728b9ded244849ee8a3544a4759dc0671c5eff4977eb7a37816a
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors, disguised as 'free generator' or 'game hack' lures. The primary link directs to 'https://netcdn.tw/app/431946152/how-to-get-free-robux-2021-2021-game-hack', which is likely intended to trick users into downloading further malware. The presence of a visual download button heuristic further supports this malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9779

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.tw/app/431946152/how-to-get-free-robux-2021-2021-game-hack In PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/roblox-hack-scrit-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/hack-client_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/how-to-hack-robux-with-cheat-engine-61_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/roblox-hacks-for-booga-booga_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fc2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FC2 31808 bytes
SHA-256: 6e1f18e615adf14d6b6282d6166001c095b12c4066f1abe7489776d2760cbbe1
font_01_sfnt_off000098ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98AD 2840 bytes
SHA-256: 787e0768241fb57660bcc9c7f726cf687277c463cdf8c586c4782ee9d03c3606
font_02_sfnt_off0000a26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA26C 18684 bytes
SHA-256: 662354714a7c4aa127b8bd681013e9d5d113fbfc5a2f5afb2d34764175bb04a5

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