PDF malware analysis — malicious · 90e10c7abfb5ef74

MALICIOUS

PDF

35.6 KB Created: 2021-07-06 11:37:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 66950d719f0b7abc08e83bd895a292c2 SHA-1: 6b6ad2cb7904619fbad7af739020d134c43eb3f7 SHA-256: 90e10c7abfb5ef749e3866852814e1bd3f073299bb319e38ac4b4c1d861b1cc7

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to a malicious redirector, specifically http://netcdn.tw/app/406889139/unlimited-free-spins-coin-master-game-hack, which is designed to lure users into downloading further malicious content or engaging in phishing activities. The document body and embedded URLs reinforce this lure by promising game hacks and free currency. The presence of 'cmd' in the document text suggests potential command execution, possibly to download and run a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

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.
LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND

Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
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/406889139/unlimited-free-spins-coin-master-game-hack In PDF document text
- https://min2mojokerto.sch.id/__statics/gudangsoal/files/tiktok-free-wala_GM835599320.pdfIn PDF document text
- https://min2mojokerto.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- https://min2mojokerto.sch.id/__statics/gudangsoal/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
- https://min2mojokerto.sch.id/__statics/gudangsoal/files/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://min2mojokerto.sch.id/__statics/gudangsoal/files/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
- https://min2mojokerto.sch.id/__statics/gudangsoal/files/free-robux-no-scam-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
- https://min2mojokerto.sch.id/__statics/gudangsoal/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
- https://min2mojokerto.sch.id/__statics/gudangsoal/files/hype-dance-roblox-free_GM431946152.pdfIn PDF document text
- https://min2mojokerto.sch.id/__statics/gudangsoal/files/roblox-svg-free_GM431946152.pdfIn PDF document text
- https://min2mojokerto.sch.id/__statics/gudangsoal/files/robux-free-online_GM431946152.pdfIn PDF document text
- https://min2mojokerto.sch.id/__statics/gudangsoal/files/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
- https://min2mojokerto.sch.id/__statics/gudangsoal/files/_GM479516143.pdfIn PDF document text
- https://min2mojokerto.sch.id/__statics/gudangsoal/files/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
- https://min2mojokerto.sch.id/__statics/gudangsoal/files/naruto-rpg-roblox-cheats_GM431946152.pdfIn PDF document text
- https://min2mojokerto.sch.id/__statics/gudangsoal/files/minecraft-download-free-download_GM479516143.pdfIn PDF document text
- https://min2mojokerto.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-using-cmd_GM431946152.pdfIn PDF document text
- https://min2mojokerto.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
- https://min2mojokerto.sch.id/__statics/gudangsoal/files/daily-coin-master-link_GM406889139.pdfIn macro / runtime command snippet
- https://min2mojokerto.sch.id/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
- https://min2mojokerto.sch.id/__statics/gudangsoal/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
- https://min2mojokerto.sch.id/__statics/gIn macro / runtime command snippet
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000032ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x32EA	23064 bytes
SHA-256: `96f49e194434bda45c41af0e0fd7e0d467ad7b3af4726fea031e8428970f2959`
`font_01_sfnt_off000066f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x66F1	18868 bytes
SHA-256: `c49abecdaa9544ec52168ade0b5fd817da5f8c22ca3a04e0a21fca1b83c9f2f6`

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