PDF malware analysis — malicious · ed9f9fefd87a5fea

MALICIOUS

PDF

47.4 KB Created: 2021-05-14 03:02:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 6718172c63a2a23c2b9f3a7d7e20a2b8 SHA-1: 67a13d37c66c7dc57eae6e2ab336ab10393820b2 SHA-256: ed9f9fefd87a5fea55d3d25bac455448030b634569be204f4e288d269ccdd1dd

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "free generator / game hack" which links to malicious redirector infrastructure. The primary link directs to a URL associated with game hacks and free Robux, a common phishing pretext. Multiple other PDF files hosted on the mobtakerancell.ir domain are also referenced, suggesting a campaign distributing similar lures.

Machine Learning

Nyx PDF Classifier malicious score 0.9013

Heuristics 4

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.
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 https://netcdn.xyz/app/431946152/how-to-earn-robux-for-free-2021-game-hack In PDF document text
- http://mobtakerancell.ir/assets/uploads/pages/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
- http://mobtakerancell.ir/assets/uploads/pages/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
- http://mobtakerancell.ir/assets/uploads/pages/files/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
- http://mobtakerancell.ir/assets/uploads/pages/files/free-2021-robux_GM431946152.pdfIn PDF document text
- http://mobtakerancell.ir/assets/uploads/pages/files/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
- http://mobtakerancell.ir/assets/uploads/pages/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
- http://mobtakerancell.ir/assets/uploads/pages/files/www-free-robux-com_GM431946152.pdfIn PDF document text
- http://mobtakerancell.ir/assets/uploads/pages/files/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
- http://mobtakerancell.ir/assets/uploads/pages/files/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
- http://mobtakerancell.ir/assets/uploads/pages/files/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
- http://mobtakerancell.ir/assets/uploads/pages/files/free-robux-place_GM431946152.pdfIn PDF document text
- http://mobtakerancell.ir/assets/uploads/pages/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
- http://mobtakerancell.ir/assets/uploads/pages/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
- http://mobtakerancell.ir/assets/uploads/pages/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- http://mobtakerancell.ir/assets/uploads/pages/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
- http://mobtakerancell.ir/assets/uploads/pages/files/daily-spin_GM406889139.pdfIn PDF document text
- http://mobtakerancell.ir/assets/uploads/pages/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
- http://mobtakerancell.ir/assets/uploads/pages/files/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
- http://mobtakerancell.ir/assets/uploads/pages/files/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
- http://mobtakerancell.ir/assets/uploads/pages/files/coin-master-hack-online-android_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_off00004fa9.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4FA9	25724 bytes
SHA-256: `19bd738e443f5d99ed3ab84b27fb1f2d711063a7012e5456cd2e0ff156da8b1a`
`font_01_sfnt_off00008b7e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B7E	2840 bytes
SHA-256: `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`
`font_02_sfnt_off0000952f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x952F	18808 bytes
SHA-256: `177d88bc60daff4309aceb58336b2ba1d1983158bcd2aa353c0aa46f075a8142`

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