PDF malware analysis — malicious · 1b70b886e675c2f5

MALICIOUS

PDF

35.7 KB Created: 2021-07-07 07:57:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23

MD5: ffd214da730fa551ddd451499152f798 SHA-1: 92a02228543d1d17a5a8c6f261632b61c74552ad SHA-256: 1b70b886e675c2f5d03b1efa760254deee383749983279112a866b3d72528299

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links designed to redirect users to malicious infrastructure, masquerading as generators for popular games. The heuristic firings indicate a deliberate attempt to create a link farm for SEO poisoning, directing users to potentially harmful content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest a phishing or scam-based attack pattern.

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-coin-master-stuff-game-hack In PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/javascript-free-robux_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-get-free-roblox-games_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/roblox-solo-hack-client_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/roblox-online-free_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/roblox-premium-free_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-robux-discord_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/i-will-hack-you-roblox-audio_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-free-link-daily_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_off00003648.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3648	22800 bytes
SHA-256: `b313fa6d510d835c1270a9097949e58c7cbc8a6477ce2589ad1f23ce728745dd`
`font_01_sfnt_off0000696a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x696A	18140 bytes
SHA-256: `0adbfa1a4dab6338e13ea67aa32732ad7a3b3fbafcfb99206ef3c7e6ec11ff9e`

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