PDF malware analysis — malicious · 3f5c7622fce5b44c

MALICIOUS

PDF

44.8 KB Created: 2021-05-20 01:08:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 7c422c1598d409ec08a0bb5a06fa7ccd SHA-1: 718f06a48a57cdea91e3e36d6c8365c3c8c82e1c SHA-256: 3f5c7622fce5b44cd95fe70fe4daf85709d1a9c4b7ac521717fff440b4ac0bbb

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users into clicking on them by promising free in-game currency or hacks for games like Roblox and Coin Master. One primary link, https://netcdn.xyz/app/431946152/roblox-hack-client-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a social engineering tactic to drive traffic to potentially malicious sites, likely as part of a phishing or malware distribution campaign.

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 https://netcdn.xyz/app/431946152/roblox-hack-client-game-hack In PDF document text
- https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/get-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/blox-rewards_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/minecraft-pe-mod-menu_GM479516143.pdfIn PDF document text
- https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/roblox-2021_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-roblox-templates_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-robux-giveaway_GM431946152.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_003_off00004d4a.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4D4A	27316 bytes
SHA-256: `2b236debb65aead86bc61253a7802ebb9189aacf8372a432e8e55c15d985843f`
`font_01_sfnt_off00008c67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C67	18408 bytes
SHA-256: `550f62bb1f49814ef42b1b735b63b4edf215944f9d7482118736a3d91d594bfc`

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