PDF malware analysis — malicious · d342fb5005234a8e

MALICIOUS

PDF

35.7 KB Created: 2021-06-22 04:15:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 16c99e62da171ec970a693cc3982e1fb SHA-1: 3992059f6454ceda1db81b23a6c5b1d93ec33efb SHA-256: d342fb5005234a8eb50a7fdec90a4125d595d14a0dcc4f6185bc5ea036bafa12

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on them, likely leading to malicious websites or downloads. The primary redirector URL, http://netcdn.co/app/406889139/coin-master-free-2021-spin-link-game-hack, is flagged as malicious. The document body and heuristics indicate a scam related to game hacks and free currency, a common social engineering tactic.

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.co/app/406889139/coin-master-free-2021-spin-link-game-hack In PDF document text
- http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/minecraft-cracked-client_GM479516143.pdfIn PDF document text
- http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
- http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-robux-2021_GM431946152.pdfIn PDF document text
- http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
- http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
- http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
- http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
- http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
- http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
- http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
- http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
- http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
- http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-coin_GM406889139.pdfIn PDF document text
- http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/robux-robux_GM431946152.pdfIn PDF document text
- http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
- http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
- http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
- http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
- http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/www-roblox-com-robux-free_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
`font_00_sfnt_off00003306.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3306	23440 bytes
SHA-256: `b86b9117a5ef73bedd9efc10f2018609a59449ac6dbc0de27c58fdc2b63db35b`
`font_01_sfnt_off0000677d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x677D	18748 bytes
SHA-256: `96324e6ce0c81689c6b9eecc120e41c8c4a64b67d53a9c8495a7c5a7aa900936`

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