Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b6fee4880eb997…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 02:12:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5df46a0e7cdac38cda80b133de01801c SHA-1: 0a5b94992d9134af5163265a00330251da2095b2 SHA-256: 82b6fee4880eb997eebe8edbb4ce5200c22be0a88b3dd16946fd0fdade17f58f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'game hacks' and 'free generators' to entice users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The document's structure and embedded URLs strongly suggest a phishing or malware distribution campaign.

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/hacks-for-coin-master-game-hack In PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-free-spin-link-new_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/2021-roblox-reach-hacks_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/pokemon-go-best-free-outfits_GM1094591345.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/hack-para-la-annimasion-de-ninja-en-roblox_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/free-robux-scam-sites_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/code-cheat-roblox-to-chat_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/robux-free-online_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_002_off00003400.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3400 23356 bytes
SHA-256: 754cd02a5408f4bb57faff5c3a5c7803a5eaa23bb8db189eb8d55ef0347c2d83
font_01_sfnt_off000068b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B8 18168 bytes
SHA-256: 2bfcb4163b812226cd47596b142d521ffaa054870a503a3a35fc7e2d65b5d65d

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