PDF malware analysis — malicious · d4bcd0528103aa1b

MALICIOUS

PDF

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

MD5: 16141d2a15dd52bd1bb35ad668ab46f7 SHA-1: 6ba03643b613323ebb331c17fc5223e39a55ac66 SHA-256: d4bcd0528103aa1b097ba583309e80e15d1bb7ec47676f33aa998f0aa16a432e

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on them under the guise of free game currency or hacks. The primary link redirects to a known malicious site, and the document body is filled with SEO-optimized links to other potentially malicious PDF files. The presence of these links and the ML classifier output strongly suggest a phishing or scam campaign.

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/free-robux-codes-not-used-game-hack In PDF document text
- https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
- https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/roblox-hack-deutsch-handy_GM431946152.pdfIn PDF document text
- https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/free-minifigure-codes-on-roblox_GM431946152.pdfIn PDF document text
- https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/how-do-i-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/free-robux-no-verification-ios_GM431946152.pdfIn PDF document text
- https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/hacks-para-arsenal-roblox_GM431946152.pdfIn PDF document text
- https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
- https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack-code_GM431946152.pdfIn PDF document text
- https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
- https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
- https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
- https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/to-get-free-robux_GM431946152.pdfIn PDF document text
- https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/free-coin-master-hacks_GM406889139.pdfIn PDF document text
- https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
- https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
- https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/roblox-cheats-get-free-robux_GM431946152.pdfIn PDF document text
- https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
- https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
- https://e-learning.mtsn2-kotabekasi.sch.id/__statics/gudangsoal/files/free-robux-websites-no-human-verification_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_off000030c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30C7	21852 bytes
SHA-256: `62a750bfa9a760376a2a40fd6b3562c1870d36e72b64448ce3762bb9a03463e9`
`font_01_sfnt_off000060dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60DC	18996 bytes
SHA-256: `f2ef840589acbf5544ca5c360f8f850f834bdb07628ffcf9725997a7326c7744`

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