PDF malware analysis — malicious · effe72ac215edab0

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 15:51:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23

MD5: 92ee90a7a1c93aab347371927c6d22d1 SHA-1: 8ea6c92a5ed4a95837cd3ca5fff37ec98c712741 SHA-256: effe72ac215edab0c332316d092b3af068b459801769bc16ab0027b484eecb5e

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appear to be "free generator" or "game hack" sites. Several heuristics indicate these links lead to malicious redirector infrastructure. The document body, though partially corrupted, contains a URL that aligns with the malicious redirector findings. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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/406889139/coin-master-free-spins-and-coins-link-today-game-hack In PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/coin-master-link-app_GM406889139.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/coin-master-hack_GM406889139.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/minecraft-java-code-free_GM479516143.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/master-coin-free-link_GM406889139.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/roblox-free-item-codes_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
`stream_004_off000055c4.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x55C4	24252 bytes
SHA-256: `0431b2f06e756e52409cbf2dba0561375061150b3b7643a6150c4f272254a431`
`font_01_sfnt_off00008d5d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D5D	3560 bytes
SHA-256: `c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93`
`font_02_sfnt_off000099e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x99E3	18412 bytes
SHA-256: `5606d742d49c2f618a839db89fb2f395f675f912dcc06d31cfc3972fb9700339`

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