PDF malware analysis — malicious · c0b0849ec6e7584d

MALICIOUS

PDF

37.3 KB Created: 2021-07-03 15:56:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: d17cefaebc46b1e9b9cb89d1e2e0e189 SHA-1: 576aac58d2c051e12cfaad079937cab4ea7f2219 SHA-256: c0b0849ec6e7584d3ab69b36aa9aefeb8490c4f4f2be4ad05a196b9866107dc5

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to websites offering game hacks and free currency, indicating a lure for users to click through to potentially malicious sites. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of such links were generated, and the 'ML_NYX_PDF_MALICIOUS' score is very high. The document body, though partially corrupted, contains references to game hacks and the primary malicious URL.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 6

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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 http://netcdn.tw/app/406889139/free-spins-on-coin-master-link-game-hack PDF link annotation
- https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/how-to-hack-to-get-limiteds-roblox_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/free-roblox-codes-no-human-verification_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/project-alpha-roblox-hack_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/minecraft-java-hacks_GM479516143.pdfIn PDF document text
- https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/free-robux-only-works-today_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-inspect-2021_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
- https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/can-people-hack-your-computer-through-roblox_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/how-to-get-free-stuff-on-roblox-catalog-2021_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/actual-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/free-robux-codes-2021-july_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_002_off000039df.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x39DF	23528 bytes
SHA-256: `e914f08f6417c0a80c9dab675ae1f527d825191e23e184ca3054404f469ac378`
`font_01_sfnt_off00006f31.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F31	18344 bytes
SHA-256: `e8d74cdfafe168009f9dc4b70b31a19d6777835fd11eed0a51de0eb2e067c79b`

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