PDF malware analysis — malicious · 4e4ea6aaeb2a6d63

MALICIOUS

PDF

36.8 KB Created: 2021-07-05 10:41:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 753a35a55c2b9e58b5471be419e6d5b0 SHA-1: c5da358c641d79e5bb52bcdd621d93fb83ef7be6 SHA-256: 4e4ea6aaeb2a6d6333849ad1f7f2e4fafaa53971c7c7fd39856ee7b5a81551d2

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is designed as a lure, promising free game currency ('Robux') and hacks. It contains multiple links to redirector domains and SEO link farms, including a critical finding of a known malicious redirector. The document body and embedded links strongly suggest a phishing or scam attempt to drive traffic to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/how-to-get-free-robux-without-downloading-apps-2021-game-hack In PDF document text
- https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
- https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/hackear-prison-life-roblox-2021_GM431946152.pdfIn PDF document text
- https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/free-robux-generator-for-robots_GM431946152.pdfIn PDF document text
- https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/roschashcom-earn-free-robux-by-watching-videos-and-completing-sirveys_GM431946152.pdfIn PDF document text
- https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/robux-hack-no-verification-survey_GM431946152.pdfIn PDF document text
- https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
- https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/roblox-how-to-add-a-thumbnail-for-free_GM431946152.pdfIn PDF document text
- https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
- https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
- https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/telecharger-roblox-booga-booga-hack-le-meilleur_GM431946152.pdfIn PDF document text
- https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
- https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/free-purple-clothes-roblox_GM431946152.pdfIn PDF document text
- https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
- https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
- https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/how-too-hack-a-roblox-account_GM431946152.pdfIn PDF document text
- https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/coin-master-hack-version-download-ios_GM406889139.pdfIn PDF document text
- https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/get-robux-for-free-generator_GM431946152.pdfIn PDF document text
- https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/how-to-reach-hacks-in-sf-roblox_GM431946152.pdfIn PDF document text
- https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-facebook_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_002_off000032af.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x32AF	23048 bytes
SHA-256: `ea85e4a582f95a636a24b04bd4344d59acd466b9facf57e31cdd70bf9d538c79`
`font_01_sfnt_off000066cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x66CF	20464 bytes
SHA-256: `bbee3cd2d045934f3587faaae269c5438879465e49c598d076b35cc198d7b491`

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