Malicious PDF — malware analysis report

Static analysis result for SHA-256 74fbe151b0dbd468…

MALICIOUS

PDF

47.8 KB Created: 2021-06-13 15:07:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 68fea88916e5f904c1f1491c80856cde SHA-1: 568f0c8b23b41bf6e898499dcb3a920229a9f397 SHA-256: 74fbe151b0dbd4682bf6bf22930f5de0ffd8ecf8fe8465e96336e13da043d486
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to entice users. It contains a critical link to a malicious redirector infrastructure, which in turn hosts a large number of SEO-optimized PDF links. These secondary links likely serve to further obfuscate the malicious intent or lead users to phishing pages. The document's structure and embedded links strongly suggest a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • 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.
  • 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.co/app/431946152/free-roblox-cards-codes-to-get-robux-game-hack In PDF document text
    • http://library.smpn2-byl.sch.id//repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/free-roblox-dump-account-june-2021_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/spin-coin_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-roblox-intros_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/genarater-that-gives-free-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/how-to-hack-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000504a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x504A 24812 bytes
SHA-256: cd8b884a138d27e384591d292a27dd0b7de93166c169eac06c9acd4e30d42a20
font_01_sfnt_off000089ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89CE 3992 bytes
SHA-256: 43e72e756231cfd354bd65c2ed3b09ad4eff56ad11e7f155ed2920e6bb7860dd
font_02_sfnt_off000096f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96F4 18592 bytes
SHA-256: eb2af0b7618db050e0c614b5769152f075c8d1ed29607174b71f99df1ce9efc5

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