PDF malware analysis — malicious · a693482fb7a206c0

MALICIOUS

PDF

49.2 KB Created: 2021-06-10 16:36:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 74da2d14dfc0b69d631710855075cda0 SHA-1: efdd7ccde55cdec324862b7be2a07553b4f794ee SHA-256: a693482fb7a206c0dcffcb535148b3200a74a04084a98f2a9b5c5bfb09de5a9f

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous external links, many of which point to other PDF files, suggesting a link farm or SEO manipulation tactic. The presence of a 'download button' lure and the ML classifier's high confidence score indicate malicious intent. While no scripts were directly extracted, the structure and linked content suggest a workflow designed to trick users into downloading further malicious payloads or visiting malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

Heuristics 4

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
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.tw/app/431946152/free-mobile-24-robux-game-hack PDF link annotation
- https://inspiration-modellbau.de/images/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
- https://inspiration-modellbau.de/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
- https://inspiration-modellbau.de/images/roblox-meep-city-how-to-get-free-plus_GM431946152.pdfIn PDF document text
- https://inspiration-modellbau.de/images/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
- https://inspiration-modellbau.de/images/roblox-hack-app_GM431946152.pdfIn PDF document text
- https://inspiration-modellbau.de/images/robux-hack-me_GM431946152.pdfIn PDF document text
- https://inspiration-modellbau.de/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://inspiration-modellbau.de/images/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
- https://inspiration-modellbau.de/images/game-test-labs-hack-roblox_GM431946152.pdfIn PDF document text
- https://inspiration-modellbau.de/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
- https://inspiration-modellbau.de/images/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
- https://inspiration-modellbau.de/images/how-to-hack-hell-on-roblox_GM431946152.pdfIn PDF document text
- https://inspiration-modellbau.de/images/robux-robux_GM431946152.pdfIn PDF document text
- https://inspiration-modellbau.de/images/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://inspiration-modellbau.de/images/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
- https://inspiration-modellbau.de/images/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
- https://inspiration-modellbau.de/images/roblox-pet-free_GM431946152.pdfIn PDF document text
- https://inspiration-modellbau.de/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
- https://inspiration-modellbau.de/images/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
- https://inspiration-modellbau.de/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005101.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5101	27160 bytes
SHA-256: `0b7b600d4ece9f3ef5d66b2ab9326ee0c9f501b0a2c833047c62831c7a03864d`
`font_01_sfnt_off00008feb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8FEB	5696 bytes
SHA-256: `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`
`font_02_sfnt_off00009cfd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9CFD	18592 bytes
SHA-256: `96fdd68d580c86004e2c7d20e56f92067ca788c34664e5610b567f65a1f6fbcb`

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