PDF malware analysis — malicious · 924e0c50ecc28df5

MALICIOUS

PDF

45.3 KB Created: 2021-05-16 12:39:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 28c71ab13947b9e3048b1b9b16595a96 SHA-1: 220ca60fb81938d1e9e3c70529752fb26115fea8 SHA-256: 924e0c50ecc28df5fc41bb511e324daf000aa57ff8bdd8bdde7eb251814621f2

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) 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 0.9551

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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.xyz/app/406889139/coin-master-hack-tool-ios-game-hack PDF link annotation
- http://elearning.madagresik.sch.id/__statics/gudangsoal/files/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
- http://elearning.madagresik.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
- http://elearning.madagresik.sch.id/__statics/gudangsoal/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
- http://elearning.madagresik.sch.id/__statics/gudangsoal/files/roblox-redeem-robux_GM431946152.pdfIn PDF document text
- http://elearning.madagresik.sch.id/__statics/gudangsoal/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
- http://elearning.madagresik.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- http://elearning.madagresik.sch.id/__statics/gudangsoal/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
- http://elearning.madagresik.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
- http://elearning.madagresik.sch.id/__statics/gudangsoal/files/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
- http://elearning.madagresik.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
- http://elearning.madagresik.sch.id/__statics/gudangsoal/files/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
- http://elearning.madagresik.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
- http://elearning.madagresik.sch.id/__statics/gudangsoal/files/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
- http://elearning.madagresik.sch.id/__statics/gudangsoal/files/free-robux-for-free_GM431946152.pdfIn PDF document text
- http://elearning.madagresik.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
- http://elearning.madagresik.sch.id/__statics/gudangsoal/files/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
- http://elearning.madagresik.sch.id/__statics/gudangsoal/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
- http://elearning.madagresik.sch.id/__statics/gudangsoal/files/roblox-points_GM431946152.pdfIn PDF document text
- http://elearning.madagresik.sch.id/__statics/gudangsoal/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
- http://elearning.madagresik.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-spins_GM406889139.pdfIn 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_003_off00004be1.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4BE1	25580 bytes
SHA-256: `089d5195b7cb210fc459fc4ab63e7396fb4c4c2f2cb46a39fb92cd35dd341d20`
`font_01_sfnt_off000085e6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85E6	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off00008fd1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8FD1	17788 bytes
SHA-256: `4f2a38718d9989b5298901949fd418d07efa2361880d56d3118be161e3e9b85d`

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