Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf2082d0d310ee21…

MALICIOUS

PDF

44.2 KB Created: 2021-05-13 09:24:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b7470290a807b43bad8a4a4a064a8101 SHA-1: abdef635514ca56482883caa782e8d4f5e4106cd SHA-256: bf2082d0d310ee213eb7049a99a9bd7eb40ce9acb9904cc554eb3fbf1e888384
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users to external websites, masquerading as generators or hacks for popular games. The primary link directs to a known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially malicious content or phishing pages, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • 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.
  • 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-spin-link-free-download-game-hack In PDF document text
    • http://gomelavto.by/images/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://gomelavto.by/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/free-robux-without-verification_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
stream_003_off00004bfc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BFC 27552 bytes
SHA-256: 6aa5bb11a05e1fd9184d10b7d42de2c87cc132cd49c5505be3bd9780eeaaf751
font_01_sfnt_off00008a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A45 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132

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