PDF malware analysis — malicious · ec7f6889876122ee

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 21:08:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: d359737775e23593d3646fb76b522ef7 SHA-1: 0d18f087d5a7135d7d813f3ab4f219cc14352ff8 SHA-256: ec7f6889876122ee67ead042526ef0404e2dad0f86faee681ec4c98996dd2228

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links disguised as generators or hacks for popular games, directing users to a malicious redirector and a link farm. The document body explicitly contains the URL http://netcdn.tw/app/406889139/how-to-generate-free-coin-master-spin-game-hack, which is flagged as a malicious redirector. The presence of many external links suggests an attempt to drive traffic to potentially harmful sites.

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.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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/how-to-generate-free-coin-master-spin-game-hack In PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/fan-page-coin-master_GM406889139.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/roblox-ninja-assassin-cheat-engine_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/get-free-robux-only-today_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/hack-roblox-mod-menu_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/free-robux-generator-for-10-year-olds_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/genarate-free-robux-gift-card_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/pokemon-go-free-quick-catch_GM1094591345.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/free-roblox-inventroy_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/err-face-roblox-free_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00003358.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3358	23288 bytes
SHA-256: `637b47b201aecd02fc976889e5457eb7649c24b8a2e1beb83cb35896372c7f1f`
`font_01_sfnt_off000067d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67D7	18336 bytes
SHA-256: `44149cbd1419f5cddd2185958f28928906a990b98f16256b2ecbc419de034d9f`

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