PDF malware analysis — malicious · 835e7a3ba866141f

MALICIOUS

PDF

47.4 KB Created: 2021-06-03 13:58:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: fcf4a9273bb8d6ee280737a8aef1f7d2 SHA-1: 8659e5966947b826fef7370bb317ebe81924a9f9 SHA-256: 835e7a3ba866141fe5cb74897639f028415d2378fa2e77389d3b44284f8ae83f

220 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 in-game currency, indicating a lure for users to visit potentially malicious sites. The heuristic firings confirm the presence of malicious redirectors and a link farm designed to attract traffic. While no scripts were explicitly extracted, the nature of the links suggests a potential for downloading further payloads or redirecting to exploit kits.

Machine Learning

Nyx PDF Classifier malicious score 0.9769

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.online/app/479516143/free-minecraft-mods-for-xbox-one-game-hack In PDF document text
- https://library.institutpendidikan.ac.id/repository/coin-master-card-hack_GM406889139.pdfIn PDF document text
- https://library.institutpendidikan.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://library.institutpendidikan.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://library.institutpendidikan.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
- https://library.institutpendidikan.ac.id/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
- https://library.institutpendidikan.ac.id/repository/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
- https://library.institutpendidikan.ac.id/repository/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
- https://library.institutpendidikan.ac.id/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
- https://library.institutpendidikan.ac.id/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
- https://library.institutpendidikan.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
- https://library.institutpendidikan.ac.id/repository/earn-free-robux_GM431946152.pdfIn PDF document text
- https://library.institutpendidikan.ac.id/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
- https://library.institutpendidikan.ac.id/repository/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
- https://library.institutpendidikan.ac.id/repository/coin-master-download-hack_GM406889139.pdfIn PDF document text
- https://library.institutpendidikan.ac.id/repository/pubg-uc-and-skins-smm-panel_GM1330123889.pdfIn PDF document text
- https://library.institutpendidikan.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
- https://library.institutpendidikan.ac.id/repository/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
- https://library.institutpendidikan.ac.id/repository/a-promo-code-that-gives-us-free-robux-no-waiting_GM431946152.pdfIn PDF document text
- https://library.institutpendidikan.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
- https://library.institutpendidikan.ac.id/repository/how-to-start-a-minecraft-server-for-free_GM479516143.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_off00005391.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5391	25468 bytes
SHA-256: `30d286ee53611a55ef50cbfef11560a402507d5205bb2f8085f67472627b4fbc`
`font_01_sfnt_off00008c35.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C35	2840 bytes
SHA-256: `30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37`
`font_02_sfnt_off000095e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x95E8	18480 bytes
SHA-256: `3034162bb212f750d30f3b083c49397834114f606ecb661b66a42b1e278b7a45`

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