Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf7319aa3e92571…

MALICIOUS

PDF

43.7 KB Created: 2021-05-15 07:34:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c7d167596ae943612c076f1aa6647f75 SHA-1: 30bbdba841a20472a82202b14d782b634aa5b8d9 SHA-256: bdf7319aa3e92571dcba0f3adeae367c619142c43a97a2e0472b4a259ffb7ae2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious infrastructure, specifically a 'free Robux' generator lure. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links points to an attempt to deliver a malicious payload or phish users. No scripts were extracted, but the document's structure and links are indicative of a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/free-robux-no-offers-game-hack In PDF document text
    • http://halitbayramoglu.com.tr/images/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/master-game_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/robux-free-com_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.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_off00004a87.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A87 27568 bytes
SHA-256: 30cba085330739aa0ca1d7015f35c6998dd316d037e23404e6828587f8666666
font_01_sfnt_off00008970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8970 18012 bytes
SHA-256: db6be32425767485114cb9000642ed63280f0807e0fe45793765b8e181fce2c0

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