Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e5e5113adae91f1…

MALICIOUS

PDF

45.9 KB Created: 2021-05-16 01:01:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6739e5bfa325fc9cdad2f0d687555c5e SHA-1: 431f9ab9186638b3b4596960ef4816f646fe9beb SHA-256: 4e5e5113adae91f139329fd78957d25efbec8dd13d89f24a8b7dd4c98da4c719
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure for credential phishing and scams, impersonating Facebook to trick users into believing they can get free spins for Coin Master. The embedded link directs to a known malicious redirector, which likely serves as a gateway to further malicious content or phishing pages. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing and scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/coin-master-free-spins-for-today-game-hack.
  • 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/406889139/coin-master-free-spins-for-today-game-hack In PDF document text
    • https://repository.umgo.ac.id/repository/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://repository.umgo.ac.id/repository/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://repository.umgo.ac.id/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.umgo.ac.id/repository/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • https://repository.umgo.ac.id/repository/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://repository.umgo.ac.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.umgo.ac.id/repository/coin-master-daily-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://repository.umgo.ac.id/repository/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • https://repository.umgo.ac.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.umgo.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://repository.umgo.ac.id/repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • https://repository.umgo.ac.id/repository/simplysarc_GM479516143.pdfIn PDF document text
    • https://repository.umgo.ac.id/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • https://repository.umgo.ac.id/repository/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • https://repository.umgo.ac.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://repository.umgo.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://repository.umgo.ac.id/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.umgo.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://repository.umgo.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://repository.umgo.ac.id/repository/300-daily-free-spins-coin-master_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.

FilenameKindSourceSize
stream_003_off00004dcf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DCF 26372 bytes
SHA-256: 4b1f60f68e610dbad1f963ee45f1c591e032ce647f99da8328e2d4eb421e164c
font_01_sfnt_off00008754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8754 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9106 18240 bytes
SHA-256: a96ac7afd25cadbabafd1b9dbf0a180d0c1833ed2d07acb4363f122556c39d20

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