Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd1f8d049ca6d445…

MALICIOUS

PDF

45.8 KB Created: 2021-05-18 03:31:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f12f1c80aca160af1ea59cc1ced6ef18 SHA-1: 0509b4871b2750352df0db835277fe942b5f46be SHA-256: cd1f8d049ca6d445b185f0e79f5456e8fe861f0ca8a793f2b6fd4d65adedb427
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector, under the guise of offering game hacks and cheats. The document body and embedded URLs strongly suggest a lure for users seeking in-game advantages, which is a common tactic for distributing malware or conducting phishing. No scripts were extracted, but the presence of malicious redirectors and lure content indicates a high likelihood of a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/406889139/coin-master-hack-download-apk-game-hack In PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/picture-roblox_GM431946152.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/easy-robux_GM431946152.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/coin-master-free-spins-1701-20_GM406889139.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/coins-master_GM406889139.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • https://travelsurabayajogja.com/ckfinder/userfiles/files/free-spin-and-coin-blogspot_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_off00004a95.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A95 25256 bytes
SHA-256: 79ea68b27691b734008805ac65c5b950095b665503527064cf49a821085f43f9
font_01_sfnt_off000084af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84AF 3204 bytes
SHA-256: 8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
font_02_sfnt_off00008fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FB3 18472 bytes
SHA-256: a0b4f907e64f54d1e36da46d63ed408052d589db2dcff26c8dd3e6dd691bcc85

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