PDF malware analysis — malicious · ae6438cc2ed70ee7

MALICIOUS

PDF

43.7 KB Created: 2021-05-15 15:44:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 9091f2cbb4e418a4e6a8421e7aa87dc9 SHA-1: 416a03a438923d01197eb03d59a707a892b07c92 SHA-256: ae6438cc2ed70ee71371854abb80e489bde1048a597de34a6faf2ae4aaf70cfd

280 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors and a link farm, masquerading as game hacks and generators. It also includes a lure for recovery secrets, suggesting a phishing or credential harvesting attempt. The embedded URLs and the nature of the lures strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

Heuristics 6

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.
Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE

Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
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/406889139/coin-master-hack-2021-ios-game-hack In PDF document text
- https://www.thecongostore.com/uploaded_files/userfiles/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.thecongostore.com/uploaded_files/userfiles/files/roblox-old-avatar_GM431946152.pdfIn PDF document text
- https://www.thecongostore.com/uploaded_files/userfiles/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.thecongostore.com/uploaded_files/userfiles/files/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
- https://www.thecongostore.com/uploaded_files/userfiles/files/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
- https://www.thecongostore.com/uploaded_files/userfiles/files/earn-robux-today_GM431946152.pdfIn PDF document text
- https://www.thecongostore.com/uploaded_files/userfiles/files/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
- https://www.thecongostore.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
- https://www.thecongostore.com/uploaded_files/userfiles/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
- https://www.thecongostore.com/uploaded_files/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.thecongostore.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
- https://www.thecongostore.com/uploaded_files/userfiles/files/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.thecongostore.com/uploaded_files/userfiles/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
- https://www.thecongostore.com/uploaded_files/userfiles/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
- https://www.thecongostore.com/uploaded_files/userfiles/files/free-minecraft-coins_GM479516143.pdfIn PDF document text
- https://www.thecongostore.com/uploaded_files/userfiles/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
- https://www.thecongostore.com/uploaded_files/userfiles/files/roblox-hack-app_GM431946152.pdfIn PDF document text
- https://www.thecongostore.com/uploaded_files/userfiles/files/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
- https://www.thecongostore.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
- https://www.thecongostore.com/uploaded_files/userfiles/files/aimbot-exe-roblox_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_off00004d36.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4D36	25660 bytes
SHA-256: `12dae5a16020525136b6ebf99ba085b4e0e6f03b95cfd45eadab4e89092a583e`
`font_01_sfnt_off000088c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88C5	18116 bytes
SHA-256: `77442674c0809aead75be931568f5718e5115af80d9dd84d81b0bed7d24a7281`

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