Malicious PDF — malware analysis report

Static analysis result for SHA-256 1005a288d9b5132a…

MALICIOUS

PDF

43.2 KB Created: 2021-05-15 08:32:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2068053e487822caf4dcf1fc6ffc1c4f SHA-1: 50b6080e178116f7202e4681dbe12e1b0a35be61 SHA-256: 1005a288d9b5132a147cdf796409c716baa216db113503210e63879e5457a1b6
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites offering game hacks and free currency, identified as a lure for malicious activity. The primary redirector URL, https://netcdn.xyz/app/431946152/free-robux-no-password-game-hack, and a large number of linked PDF files from hardbit.cn suggest a link farm designed to attract users searching for cheats. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/431946152/free-robux-no-password-game-hack In PDF document text
    • http://hardbit.cn/images/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/install-coin-master_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/no-robux_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/free-robux-group_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/coinmaster_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/get-free-robux-now_GM431946152.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
stream_003_off000048d7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D7 25944 bytes
SHA-256: 9fd8a9fbd747d36a27653e199019b45319ea4480cfdc48da47a09612c83166e8
font_01_sfnt_off000084fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84FA 18732 bytes
SHA-256: b254955316d184f98c6f6070526605807868e3146c8b9e5f8ca39f20861b2296

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