PDF malware analysis — malicious · 3dc3219922be58d6

MALICIOUS

PDF

44.3 KB Created: 2021-06-07 18:22:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23

MD5: 39d136509805d577c24b24e8c3495cf5 SHA-1: 358aad77964393d2e91d0ff5c5883c87bbd2b250 SHA-256: 3dc3219922be58d6e2f8ea7be4a98a6d33939422c211075fd0d7ddea17fbed74

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, including a known malicious redirector, under the guise of providing game hacks and free currency. The document body and heuristics indicate a lure to exploit user interest in obtaining in-game advantages, likely leading to further malicious content or scams. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/hacks-to-get-into-houses-on-roblox-game-hack In PDF document text
- http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
- http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
- http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
- http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-free-robux-2021_GM431946152.pdfIn PDF document text
- http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
- http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
- http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
- http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
- http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/minecraft-online-free-download_GM479516143.pdfIn PDF document text
- http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
- http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-views-on-tiktok_GM835599320.pdfIn PDF document text
- http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
- http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
- http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
- http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
- http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
- http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
- http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/minecraft-client-download_GM479516143.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_off00005338.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5338	24052 bytes
SHA-256: `4ee1b8093e442c4b0f04bbbe296fc5943842818a9895bd3612aeb8d85e4abc00`
`font_01_sfnt_off000089d3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x89D3	18428 bytes
SHA-256: `1bdfda58e4208eecda087f09c85e6ef72d791b300aab2cf6ef2f11b5680369a1`

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