PDF malware analysis — malicious · 930d835705dabb44

MALICIOUS

PDF

46.6 KB Created: 2021-05-13 16:04:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31

MD5: 1b52abe60e07df881af1fc984258dfca SHA-1: 6854b86b6786d13c6c8f591ba3639c7aa65c729c SHA-256: 930d835705dabb441ae96273d3d67472d38bff94c524b1802474bdb37a92d47c

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a malformed exploit stream and links to known malicious redirector infrastructure, specifically promoting a "game hack" lure. The embedded document body text and numerous URLs reinforce this theme, aiming to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.8948

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.
Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH

A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
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/479516143/how-to-get-minecraft-pe-for-free-ios-game-hack In PDF document text
- http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-hack-club_GM406889139.pdfIn PDF document text
- http://www.weworkkuwait.com/uploaded_files/userfiles/files/oprewards-login_GM431946152.pdfIn PDF document text
- http://www.weworkkuwait.com/uploaded_files/userfiles/files/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
- http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
- http://www.weworkkuwait.com/uploaded_files/userfiles/files/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
- http://www.weworkkuwait.com/uploaded_files/userfiles/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://www.weworkkuwait.com/uploaded_files/userfiles/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
- http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
- http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
- http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
- http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
- http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
- http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
- http://www.weworkkuwait.com/uploaded_files/userfiles/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
- http://www.weworkkuwait.com/uploaded_files/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
- http://www.weworkkuwait.com/uploaded_files/userfiles/files/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
- http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
- http://www.weworkkuwait.com/uploaded_files/userfiles/files/roblox-hack-ga_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
`font_00_sfnt_off00004d64.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4D64	30500 bytes
SHA-256: `0819bf212d58c033ffcca7a2345602f2f4c63671e5aee45f25781ee518bd89b4`
`font_01_sfnt_off00008adc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8ADC	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off000094c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x94C6	18028 bytes
SHA-256: `3ef771fcdeed521b42e77c192c553d5a3bd318aced348222e5c137e62eefd75e`

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