PDF malware analysis — malicious · 230014917d8d7080

MALICIOUS

PDF

43.3 KB Created: 2021-05-13 07:34:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 28ea4271f8a86bb6ada85616b6c8e6ca SHA-1: 1c0edb47506b781843379c8dc4d723ec09793d37 SHA-256: 230014917d8d7080d035128d2a745f0839157c2cdbba4329172f5d8a2991e7c5

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

Heuristics 5

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.
PDF links to a 'free generator / game hack' redirector high 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.
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
External URI info PDF_URI

PDF contains an external URL action
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/406889139/coin-master-daily-free-spins-2021-game-hack PDF link annotation
- http://asiasieja.pl/images/apps-for-free-robux_GM431946152.pdfIn PDF document text
- http://asiasieja.pl/images/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
- http://asiasieja.pl/images/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
- http://asiasieja.pl/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
- http://asiasieja.pl/images/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
- http://asiasieja.pl/images/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
- http://asiasieja.pl/images/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
- http://asiasieja.pl/images/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
- http://asiasieja.pl/images/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://asiasieja.pl/images/coin-master-game-free-download_GM406889139.pdfIn PDF document text
- http://asiasieja.pl/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
- http://asiasieja.pl/images/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
- http://asiasieja.pl/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
- http://asiasieja.pl/images/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
- http://asiasieja.pl/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
- http://asiasieja.pl/images/robux-no-human-verification_GM431946152.pdfIn PDF document text
- http://asiasieja.pl/images/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
- http://asiasieja.pl/images/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
- http://asiasieja.pl/images/free-robux-apk_GM431946152.pdfIn PDF document text
- http://asiasieja.pl/images/how-to-get-free-robux-codes-2021_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_off00004c37.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4C37	25544 bytes
SHA-256: `d9b564557e0e891b729899f1d4a134130a3801413c73c8e2896cee932a328693`
`font_01_sfnt_off000085b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85B2	18708 bytes
SHA-256: `0e09573a858265cfc65c534eb28458a66078312e2bd7bae94317e03ea41fcd19`

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