Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8a62ab85056d811…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 12:52:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a81fb787be0473d6c77b15dfa1e3105f SHA-1: 870080128dd0f573eedfe622920288fa018938e8 SHA-256: a8a62ab85056d81171cf8142b1495fcf219070e2e4db159c71d2feae6e8d3090
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, masquerading as game hacks and free currency generators. The primary lure URL is http://netcdn.tw/app/479516143/how-to-get-minecraft-pocket-edition-for-free-game-hack, which is flagged as malicious. The document body and embedded URLs indicate a social engineering tactic to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of malicious redirectors and the lure content strongly suggest a phishing or scam attempt.

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/479516143/how-to-get-minecraft-pocket-edition-for-free-game-hack In PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-websites-for-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-make-a-roblox-dominus-for-free_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/august-2021-free-robux-legit_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-hack-injector-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-how-to-hack-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-skins-editor-free_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/hack-download-mega-innovation-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/first-time-builders-club-roblox-free_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/enter-code-for-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-do-u-hack-a-roblox-account_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/murder-mystery-free-online-games-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-minecraft-servers-to-join_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_off000033b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B0 21764 bytes
SHA-256: 542e50faacaf3ac8d4889667b87f77c16d4e165a27ddacaa23205a426a15bb73
font_01_sfnt_off000062ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CE 18660 bytes
SHA-256: b13a25137ff5bf184941611dadd5274b7697b7880b48ae01eb7c808e4237078c

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