PDF malware analysis — malicious · e1088d2353f3afec

MALICIOUS

PDF

33.1 KB Created: 2021-07-04 13:03:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27

MD5: d41f039273c5cbc93f14def2f70f69fd SHA-1: ba62ea8f0f3026265664e918c6f859d1664721ac SHA-256: e1088d2353f3afecbce2b5f4b0b9f5f5426e832d779d5c3cbf3fc13a04f71314

214 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users to a malicious redirector hosted at http://netcdn.tw/app/406889139/free-spins-for-coin-master-game-game-hack. This redirector is associated with a link farm, suggesting an attempt to drive traffic for potentially malicious purposes such as phishing or malware distribution. The document body and heuristics confirm the lure is related to game hacks and free spins, a common social engineering tactic.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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.
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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/406889139/free-spins-for-coin-master-game-game-hack In PDF document text
- https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
- https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/roblox-cheat-engine-speed-hack-no-shutdown_GM431946152.pdfIn PDF document text
- https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
- https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
- https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
- https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
- https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
- https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
- https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
- https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
- https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
- https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/coin-master-download-hack_GM406889139.pdfIn PDF document text
- https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/hacks-roblox-mad-city_GM431946152.pdfIn PDF document text
- https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/how-to-get-vip-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
- https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
- https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
- https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
- https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/free-robux-android_GM431946152.pdfIn PDF document text
- https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/free-robux-app-2021_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_off000030ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30BA	21892 bytes
SHA-256: `85f25c3aab417869b36a7d7f282009fad2ad1a7d75d56d54ae5e8c6c18b39935`
`font_01_sfnt_off00006149.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6149	18432 bytes
SHA-256: `ba2b1c803cf60430fecd3a4ea667911e0c566277fb0db9da711a2662cfde09a8`

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