PDF malware analysis — malicious · a9f3120890b726ce

MALICIOUS

PDF

43.9 KB Created: 2021-05-13 15:28:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 1dd364991f017ed2f15bdcb270593cb7 SHA-1: 4a94107ba7f1101bc6c5b76534c774d6632f2d09 SHA-256: a9f3120890b726ce95062d6bd31e3e64c03c96aa6a6cf6354efc26642dea2cd2

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and a link farm, suggesting a phishing or scam campaign. The primary lure appears to be related to 'game hacks' and account security, aiming to trick users into clicking malicious links. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/431946152/my-roblox-account-was-hacked-game-hack In PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/roblox-girl_GM431946152.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/robux-money_GM431946152.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/master-coins-free_GM406889139.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/free-games-coin-master_GM406889139.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/game-give-free-robux_GM431946152.pdfIn PDF document text
- https://www.mahabircreation.com/uploaded_files/userfiles/files/coin-master-spin-free_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_003_off00004a84.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A84	25608 bytes
SHA-256: `23de88253591525e4c82c4b66a97c05a203ce90d62eac94c70eaed64721e045b`
`font_01_sfnt_off0000864b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x864B	19176 bytes
SHA-256: `ffd13423bb2d32432d99d8a895d46ab03e3902ef9e73634024ba4176c0f3d041`

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