Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f5b189d9c50adb8…

MALICIOUS

PDF

34.6 KB Created: 2021-06-26 23:44:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5e4a212a4516d743eef323cd804f840c SHA-1: 92c4689653730b7cdc6b3eb76fe423c5d4b106b8 SHA-256: 6f5b189d9c50adb8e31f7b1c43a44857d3ce1a21fcf6b55a57aded5d1b4a59a8
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many of which are part of a link farm designed to attract users searching for game cheats and currency. The primary redirector URL, http://netcdn.co/app/431946152/hack-speed-vehicle-simulator-roblox-game-hack, is associated with malicious activity. The document body and embedded links strongly suggest a phishing or scam attempt to lure users to potentially malicious 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.co/app/431946152/hack-speed-vehicle-simulator-roblox-game-hack In PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-roblox-card_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-hack-roblox-accounts-with-pastebin_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-do-you-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-clothes-on-roblox-image-shirt_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DC8 22312 bytes
SHA-256: 18d82c974154f7156fb83a4d1c6b2709c852e24ed60be08ab99a3bf88924450c
font_01_sfnt_off00005f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F70 19932 bytes
SHA-256: 02752ac195dc4cacf46584e0bab8e8b778dd68d47b80587b225c5f9e57ed4dc9

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