PDF malware analysis — malicious · 0a706bebef08278f

MALICIOUS

PDF

43.8 KB Created: 2021-05-16 11:57:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 8474828b4dfa4399844273a8308648d2 SHA-1: 0906c6f0da6d1c7648506cf7a9bd430f1430d805 SHA-256: 0a706bebef08278fdaa8332dc9fe6fe6abca5e1926d4cbf81d12c5c48f3e5db4

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file contains multiple links designed to lure users into clicking on what appear to be game hacks and generators. The primary malicious link, 'https://netcdn.xyz/app/406889139/coin-master-cards-free-cards-game-hack', is identified as a known malicious redirector. The document also hosts a large number of other PDF links, suggesting a link farm or SEO poisoning tactic to distribute malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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.xyz/app/406889139/coin-master-cards-free-cards-game-hack In PDF document text
- http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/minecraft-116-1-download_GM479516143.pdfIn PDF document text
- http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/hack-coin-master-android_GM406889139.pdfIn PDF document text
- http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
- http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
- http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
- http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-pet-food-hack_GM406889139.pdfIn PDF document text
- http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
- http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
- http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/rbx-roblox-robux_GM431946152.pdfIn PDF document text
- http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
- http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
- http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
- http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/hack-to-send-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
- http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/free-robux-com_GM431946152.pdfIn PDF document text
- http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
- http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
- http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/roblox-rewards-robux_GM431946152.pdfIn PDF document text
- http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
- http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-daily_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_003_off00004fc7.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4FC7	25264 bytes
SHA-256: `82196c7c0fe5f9ade902489be7c95b6e15d36245414047f3ee558f8b6452994b`
`font_01_sfnt_off00008a24.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A24	17884 bytes
SHA-256: `d54aa51eaaaa3e2864f0114713409e316145a0183ee6aba9be1e443db1dceb19`

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