Malicious PDF — malware analysis report

Static analysis result for SHA-256 f43624e3ae46b640…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 21:38:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 04b5a66421503fc59c82e764276ab97b SHA-1: 97390c6e7c0b95dab017687097ce7365c2e63270 SHA-256: f43624e3ae46b640df6dd2ab5946ad9e41f3d70f00d27c8fb12cb3a919161efe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a malicious redirector, which is designed to lure users into clicking on it. The document body and extracted URLs suggest a scam related to game hacks and free currency, likely leading to phishing or malware download sites. No scripts were extracted, but the presence of malicious redirectors and the lure content strongly indicate a 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/how-to-hack-coin-master-game-without-verification-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-332-apk-free-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-generatorf_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-cheat-tables_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-unlimited-free-robux-on-roblox-2021-jefftec_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-robux-without-getting-hacked_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/100-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-be-a-inspect-hack-on-mobile-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/download-cheat-for-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/100-free-spins-for-coin-master-2021_GM406889139.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_off00002ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF8 22432 bytes
SHA-256: 58ffd17a222e65670b65baab5767ea11f392ce0a8b2449fbd261d0bb909b56f8
font_01_sfnt_off000061de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DE 19064 bytes
SHA-256: a8480d21748a50bcf9ac3d5cfbc0b0018be210baedebb5c1ff04cbf62fe825be

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