PDF malware analysis — malicious · bd811b194bbabac8

MALICIOUS

PDF

42.6 KB Created: 2021-05-11 15:30:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27

MD5: 62df4a0efe74786302aae24cce76c056 SHA-1: 10efccead63d71f56377af9a1d9dbd71510ce1c3 SHA-256: bd811b194bbabac8bd434ce966c9a2f69aad66dc1b7062e8128a05831e93b582

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a lure for game hacks and free currency, directing users to malicious redirector infrastructure. The document contains numerous links to external PDF files hosted on what appears to be a link farm, likely intended to obscure the ultimate malicious destination. The ML classifier strongly indicates malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-free-spins-link-blogspot-april-2021-game-hack In PDF document text
- https://www.levanajewelryclub.com/uploaded_files/userfiles/files/rewardrobux-com_GM431946152.pdfIn PDF document text
- https://www.levanajewelryclub.com/uploaded_files/userfiles/files/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
- https://www.levanajewelryclub.com/uploaded_files/userfiles/files/roblox-free-printables_GM431946152.pdfIn PDF document text
- https://www.levanajewelryclub.com/uploaded_files/userfiles/files/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
- https://www.levanajewelryclub.com/uploaded_files/userfiles/files/free-robux-codes_GM431946152.pdfIn PDF document text
- https://www.levanajewelryclub.com/uploaded_files/userfiles/files/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
- https://www.levanajewelryclub.com/uploaded_files/userfiles/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.levanajewelryclub.com/uploaded_files/userfiles/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
- https://www.levanajewelryclub.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
- https://www.levanajewelryclub.com/uploaded_files/userfiles/files/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
- https://www.levanajewelryclub.com/uploaded_files/userfiles/files/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
- https://www.levanajewelryclub.com/uploaded_files/userfiles/files/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
- https://www.levanajewelryclub.com/uploaded_files/userfiles/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
- https://www.levanajewelryclub.com/uploaded_files/userfiles/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
- https://www.levanajewelryclub.com/uploaded_files/userfiles/files/coin-master-hack-game_GM406889139.pdfIn PDF document text
- https://www.levanajewelryclub.com/uploaded_files/userfiles/files/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
- https://www.levanajewelryclub.com/uploaded_files/userfiles/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.levanajewelryclub.com/uploaded_files/userfiles/files/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
- https://www.levanajewelryclub.com/uploaded_files/userfiles/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
- https://www.levanajewelryclub.com/uploaded_files/userfiles/files/how-to-get-free-spins-and-coins-in-coin-master_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_off00004a73.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A73	24484 bytes
SHA-256: `d8568079d04432dff1016c53721fa210ea21cbe06d831375ad61ee0899ced87d`
`font_01_sfnt_off000081aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x81AA	19036 bytes
SHA-256: `abaaef8123abf70c91d1a0f07b1f9da735168a40db37009f502544eec5993ff1`

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