Malicious PDF — malware analysis report

Static analysis result for SHA-256 f16b3dc649647b22…

MALICIOUS

PDF

35.5 KB Created: 2021-07-03 15:03:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f3801269c15f60ee14a11815321492a7 SHA-1: 6a0fb39a5323245bfe5158029225fb6522251eb0 SHA-256: f16b3dc649647b22b7dcea42d1f5aace3444c26ad6f8aed22b34638a4717ff99
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games. The document body and embedded links strongly suggest a social engineering lure to trick users into visiting these malicious sites, likely for further malware delivery or credential harvesting. No scripts were extracted, but the presence of malicious redirector links is a high-confidence indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spins-game-hack In PDF document text
    • http://lib.kesdammedan.ac.id/repository/roblox-community-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/hack-para-simulador-de-levantamento-de-peso-3-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/indidojoe-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/hack-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/hack-de-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/roblox-cheats-for-ninja-similar-xbox-one_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/how-to-make-a-roblox-audio-for-free_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/roblox-dayz-cheat-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/free-private-server-links-for-lumbertycoon-2-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/protosmasher-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/como-ser-hacker-en-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/2021-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/get-roebucks-com_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_002_off0000342f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x342F 23288 bytes
SHA-256: 348217213dbcdfe4f6724b45c3dccab1a7f6114f4abf443cb36b2d9cf4406cc0
font_01_sfnt_off0000688d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x688D 18176 bytes
SHA-256: c90cd52c690b3b1dd04b69356ad4f8db221968fb130a3d2ff71dcd50323a1a90

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