PDF malware analysis — malicious · fd94c1e3e0a47584

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 02:39:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23

MD5: f5a989f374391c9bb5adc28e64176875 SHA-1: 99004977b3cfb39d55b145cc8fea94b8f2c64461 SHA-256: fd94c1e3e0a47584b1ef6e884c70eaaf85358bd02cf5d3f83a160b8741111924

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links designed to lure users into clicking on what appear to be game hack generators. The primary link redirects to malicious infrastructure known for hosting such lures. The document also contains a large number of links to other PDFs, likely part of an SEO link farm, which further distribute the malicious lures. No scripts were extracted, but the presence of multiple malicious redirector links and the overall structure suggest an attempt to drive traffic to potentially harmful content.

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/free-daily-spins-coin-master-game-hack In PDF document text
- https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/free-robux-videos_GM431946152.pdfIn PDF document text
- https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
- https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
- https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/drawings-in-roblox-of-free-draw-2-apha_GM431946152.pdfIn PDF document text
- https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/hack-robar-cuentas-de-roblox-2021-akaka_GM431946152.pdfIn PDF document text
- https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
- https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/roblox-free-catalog-items-pastebin_GM431946152.pdfIn PDF document text
- https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
- https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/robux-fun-hack_GM431946152.pdfIn PDF document text
- https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
- https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
- https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
- https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/hacker-vs-glitcher-roblox-jailbreak_GM431946152.pdfIn PDF document text
- https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
- https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
- https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
- https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/coin-master-link_GM406889139.pdfIn PDF document text
- https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-2021_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_off000034f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x34F9	22352 bytes
SHA-256: `00e15df760deb390ce59bcde9c25d21b5c996819ff78637bb1ffe1ddd38130b5`
`font_01_sfnt_off00006691.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6691	18596 bytes
SHA-256: `4ad8fd882529be3d23a027a1092be38fd3a881cb86878c09c64331b24aa9a906`

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