PDF malware analysis — malicious · 9b4b4a4388fb58dd

MALICIOUS

PDF

42.2 KB Created: 2021-05-18 05:39:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: a03a95413b55217c879edbb27a93d01d SHA-1: 27ea073d3f5c17e19663a0b461fb9dcaa4d66c2f SHA-256: 9b4b4a4388fb58dde31df5abbc8d2e47364ada66c58bc7fa38c651b18762c943

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one pointing to a known malicious redirector infrastructure related to game hacks. The heuristic firings indicate the document is designed to lure users to external sites, likely for further exploitation or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user interest in game cheats.

Machine Learning

Nyx PDF Classifier malicious score 0.9988

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.xyz/app/431946152/roblox-cp-game-hack In PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/roblox-system_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/cheats-for-coin-master_GM406889139.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-games-like-roblox_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-ios-download_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
`stream_002_off000049d8.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x49D8	25120 bytes
SHA-256: `f3a2a1f45c556a0d930a25fe93d38ddbe2aa21e64087c112434aed29857bea52`
`font_01_sfnt_off000083fd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83FD	17960 bytes
SHA-256: `b4362ed69c91c8c7fb582cd3eb5794631eee1aca0fc0b19393ebd2862daffc5c`

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