PDF malware analysis — malicious · 403dc3a4f36be4eb

MALICIOUS

PDF

47.3 KB Created: 2021-06-03 17:14:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: ea2b31335f073e760f4c11e7d29f1546 SHA-1: 8731cbbfd00f182a6e194c7a19ca767301b937d5 SHA-256: 403dc3a4f36be4eb53e8952dab25b12e8202b186657b7c429cbccf24f302f99a

182 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9769

Heuristics 6

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 links to a 'free generator / game hack' redirector high 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.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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
External URI info PDF_URI

PDF contains an external URL action
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.online/app/431946152/free-roblox-executor-no-key-game-hack PDF link annotation
- https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
- https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/play-roblox-for-free-unblocked_GM431946152.pdfIn PDF document text
- https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
- https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
- https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
- https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
- https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
- https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/robux-hack-me_GM431946152.pdfIn PDF document text
- https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
- https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
- https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
- https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
- https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
- https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/builder-assistant-roblox-free_GM431946152.pdfIn PDF document text
- https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
- https://Buy.HoaxMC.comIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off000050d7.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x50D7	24532 bytes
SHA-256: `c8e03823a2ee1259277379ddac181b942fdad48cb4a6e8e34ce10685756641b5`
`font_01_sfnt_off0000892b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x892B	3884 bytes
SHA-256: `40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf`
`font_02_sfnt_off000095d3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x95D3	18372 bytes
SHA-256: `dc47713ba6eb13f64d542fcf15a88c1c3b337790738a4cc5e94b1e08b5db33e2`

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