Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e42af806599fb12…

MALICIOUS

PDF

40.8 KB Created: 2021-05-13 19:40:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2d42ffe43720a0647222d1293d0a7c7e SHA-1: 6dce00c8d678c74f510ab2994f87fd970d3b5f77 SHA-256: 2e42af806599fb129174b57646d8bd14655e5566646a302d338575cdf7a3047c
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to appear as "game hacks" or "free generators", which redirect to malicious infrastructure. The primary redirector URL is https://netcdn.xyz/app/406889139/coin-master-hack-ios-no-human-verification-game-hack. The document body and embedded links suggest a social engineering lure, likely to drive traffic to ad fraud or potentially more malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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-ios-no-human-verification-game-hack In PDF document text
    • http://gamixpaliwa.pl/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/robux-get-com_GM431946152.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/coin-master-spins-hack-iphone_GM406889139.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_off000047a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47A2 25180 bytes
SHA-256: 7d8fb153751e92d8be1d40916c8871459ea464c1fd587266b7f43e10bc57bc8b
font_01_sfnt_off00007fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD6 18248 bytes
SHA-256: 0e2f08fbfaf79afb1572705eb5799f41bcba8b5506d26f042cd240ae7feb21e3

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