Malicious PDF — malware analysis report

Static analysis result for SHA-256 61df4d762433b177…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 02:13:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: daecfa325897db013e5b4157f8bd10d2 SHA-1: 0b4bf780752f9ad76c3a40ff2736814e7f577864 SHA-256: 61df4d762433b177854185b578599e901dd153af718a5324984b980dd06c1b3a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, specifically advertising 'free generator / game hack' lures for Robux and Coin Master. The document body and heuristics indicate a social engineering tactic to trick users into visiting these malicious sites. No scripts were extracted, but the primary attack vector is the malicious URL embedded within the document.

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/431946152/bloxland-earn-free-robux-game-hack In PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/codigos-hacker-de-roblox_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/groupe-nicdaraiche-free-robux_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/hack-roblox-dungeon-quest_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-proof-2021_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/teach-me-how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-roebucks_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/minecraft-diamond-finder-hack_GM479516143.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
font_00_sfnt_off0000342b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x342B 22312 bytes
SHA-256: 73177067aeb2020d8a2bde326350c990e5c6b056697f2a4ca72c88f825251f85
font_01_sfnt_off000065e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E5 18964 bytes
SHA-256: e1def2a9526019231b9d88ec7edfc28da13730703cf387a4434b27a982203b29

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