Malicious PDF — malware analysis report

Static analysis result for SHA-256 7965374268725426…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 04:19:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5a3d0b0b5de2cca63658471c7166e855 SHA-1: 650be12ef0b846ca23751a04e4500105cd7da341 SHA-256: 7965374268725426fc053d344769541e10b6de78affeaeff7e40440f73a9b40f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links and embedded text promoting 'free generators' and 'game hacks' for popular games, directly linking to a known malicious redirector. This indicates a social engineering lure designed to trick users into visiting potentially harmful websites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-2021-robux-game-hack In PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/roblox-fly-hack-2021-download_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-roblox-gift-card-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/pocket-pirates-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/como-hackear-las-cuentas-de-roblox_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-roblox-without-downloading_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/coinmaster_GM406889139.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-800-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-robux-no-human-verification-2021-or-survey-no-download_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/roblox-blood-of-iron-hack_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/como-jugqr-roblox-free_GM431946152.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.

FilenameKindSourceSize
font_00_sfnt_off000031bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31BF 22332 bytes
SHA-256: a4cc3a565aa57dd5dc4ed46510d9a45ea33ea4447d75f532a0404bf329fce696
font_01_sfnt_off00006356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6356 19116 bytes
SHA-256: af14d1fa5b4f919e14fbfd2207fee29f86c7e1258ad11836ead4aea48baef512

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