PDF malware analysis — malicious · bee026bd35bd2b82

MALICIOUS

PDF

36.6 KB Created: 2021-07-08 15:14:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31

MD5: fdf23d5c36f3aa72fc2fdca08a5ff1ea SHA-1: 2fa01c6d45a40d1176b48c4e9eae89e2750de05c SHA-256: bee026bd35bd2b82d83d0772698f1893dce92ff25e046cf6c19867d52de14163

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free items to entice users to click on links. The primary link redirects to malicious infrastructure, which in turn hosts a large number of other PDF files, likely part of a link farm or SEO manipulation scheme. While no scripts were directly extracted, the PDF structure and embedded links suggest a malicious workflow designed to lead users to potentially harmful content.

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/406889139/hack-coin-master-game-download-game-hack In PDF document text
- https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
- https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
- https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
- https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
- https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/cheats-for-roblox-jailbreak-money_GM431946152.pdfIn PDF document text
- https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
- https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
- https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/roblox-scam_GM431946152.pdfIn PDF document text
- https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/como-hacer-trucos-para-hackear-a-la-gente-en-roblox_GM431946152.pdfIn PDF document text
- https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/roblox-redeem-card-hack-2021_GM431946152.pdfIn PDF document text
- https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/roblox-hackers-list_GM431946152.pdfIn PDF document text
- https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
- https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/roblox-cheats-and-roblox-hacks_GM431946152.pdfIn PDF document text
- https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/coin-master-free-box_GM406889139.pdfIn PDF document text
- https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
- https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/free-2021-robux-no-human-verification-easy_GM431946152.pdfIn PDF document text
- https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
- https://elearningma.almatuq.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins_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_002_off000034b6.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x34B6	23884 bytes
SHA-256: `e98eb610212e02846a548473f779894b8f2c87cc99d4aeaf705aae3651d3821f`
`font_01_sfnt_off00006acf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6ACF	18844 bytes
SHA-256: `86150aa1046335345da6ccccfb8bf228f72aa9e374df20a0ecac564e602a908d`

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