PDF malware analysis — malicious · bafcf0eef9e4083f

MALICIOUS

PDF

38.2 KB Created: 2021-07-06 16:27:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 4258abd4983fc446085677cced561116 SHA-1: 8805b00b66d634298c8ec97a3b435e407b64faa7 SHA-256: bafcf0eef9e4083f0c0be9a52949b0858f38e0b914cd70c8e2ff250d3d68f34d

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on domains associated with link farms and malicious redirectors. The document body and extracted URLs suggest a lure for game-related cheats or currency, likely leading to further malicious content or phishing pages. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

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/roblox-girl-shirts-free-game-hack In PDF document text
- https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
- https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/how-to-get-a-gamepass-for-free-in-roblox_GM431946152.pdfIn PDF document text
- https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/free-robux-place_GM431946152.pdfIn PDF document text
- https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/how-to-get-free-coins-on-tiktok_GM835599320.pdfIn PDF document text
- https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/get-robux-now_GM431946152.pdfIn PDF document text
- https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
- https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/how-to-hack-coin-master-with-game-guardian_GM406889139.pdfIn PDF document text
- https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/real-roblox_GM431946152.pdfIn PDF document text
- https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/how-to-get-more-robux_GM431946152.pdfIn PDF document text
- https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
- https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/earn-rbx_GM431946152.pdfIn PDF document text
- https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
- https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/roblox-retail-tycoon-116-infinite-money-hack_GM431946152.pdfIn PDF document text
- https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/unlimited-spin-coin-master-hack_GM406889139.pdfIn PDF document text
- https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
- https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/simple-game-hack-robux_GM431946152.pdfIn PDF document text
- https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.roblox.com/.IIn 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_off00003d3b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3D3B	22868 bytes
SHA-256: `eb27f53f6a778023164cdc37c407e7dcff68f11127dba265c71881a0b0342ff3`
`font_01_sfnt_off00007090.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7090	19040 bytes
SHA-256: `11dc966c0dff82dc846501694117a28d5e7014170ac8b3ac0ecfe8ccca56b344`

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