Malicious PDF — malware analysis report

Static analysis result for SHA-256 d309db0dfb2bf9f7…

MALICIOUS

PDF

42.5 KB Created: 2021-05-10 23:03:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7aca72ab7e9f5a4668a1acf223e0f95f SHA-1: fa614cdbbf71e13f208481c7dbc1e0f334d4e6bf SHA-256: d309db0dfb2bf9f750ab7a66f93ceadd24f1ac6e13f61da27339411359793628
220 Risk Score

Malware Insights

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

The PDF document contains numerous links designed to lure users to websites offering game hacks and generators, which are known malicious redirectors. The ML classifier strongly indicated maliciousness, and the presence of multiple external links suggests a link farm used for SEO poisoning to attract victims. While no scripts were directly extracted, the document's structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/roblox-hacks-com-game-hack In PDF document text
    • http://dermaceutic.co.uk/images/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/coin-master-hacks-for-gold-cards_GM406889139.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/free-robux-generator-no-human-verification_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_off000049d7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49D7 25064 bytes
SHA-256: e14afd4a5bce228934fc4328c7460e2e6179e524490beab777d65b230d52fb6b
font_01_sfnt_off00008358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8358 18440 bytes
SHA-256: 1a583cd050f8f98e2431c615d76cb557f5db8d78fe9a055893f9d58d3dd3bb04

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