PDF malware analysis — malicious · 3a2eaa111b82c48b

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 21:47:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 5e202a3d78d46fcb890c1cae53d7320b SHA-1: 19ac57ba34e032030dc84051a0741467d376643b SHA-256: 3a2eaa111b82c48b7086a31d8e51c94213112f1af09a3664b7ed16621e00cd93

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks' for popular games like Roblox and Coin Master. The primary redirector URL is http://netcdn.tw/app/431946152/how-to-use-scripts-in-roblox-hack-game-hack, which is flagged as malicious. The document body and embedded URLs indicate a social engineering lure to trick users into visiting these sites, likely leading to further malware downloads or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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 http://netcdn.tw/app/431946152/how-to-use-scripts-in-roblox-hack-game-hack In PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/roblox-bloxburg-free-pastebin_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/roblox-how-to-make-custom-hack_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/fazbear-free-robux_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-hack-club_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/claim-free-robux_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/roblox-free-play-no-download_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
`font_00_sfnt_off00002d3a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2D3A	22352 bytes
SHA-256: `ed11f3fdabf2160caaaa26dff40f7ef4d6e0ed807c6f0ea534fae5b9aed3a0b8`
`font_01_sfnt_off00005f19.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F19	19220 bytes
SHA-256: `a8bf9d06374e0db8ffccbebc60cb81def042f511a0a1c8beab4e32725b7b3d1b`

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