Malicious PDF — malware analysis report

Static analysis result for SHA-256 87acd558e96287fa…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 20:43:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 332301e31f677f9bdde39a26d6b61307 SHA-1: 6a045d6a1441359abd81fb3bb8741a7318c7ec5a SHA-256: 87acd558e96287fae57e48841548a9da727b122d788dc8d4b174761c938f38c7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and currency generators. The heuristic firings indicate that the PDF is designed as a lure for potentially unwanted or malicious content. While no scripts were explicitly extracted, the embedded URLs and the nature of the lures suggest an attempt to drive users to malicious sites, likely for credential harvesting or further malware delivery.

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/com-roblox-game-hack In PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/der-grste-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/robux-come_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/best-expolists-roblox-free_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/robux-offer-wall_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-no-human-verification-survey_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-free-spins-link-2021-blogger_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/welcome-to-roblox-account-hacker_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/my-ex-boyfriend-cheated-on-me-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/dbfa-hacked-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-get-a-free-face_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-protect-against-hacks-in-roblox-games_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000310a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310A 22488 bytes
SHA-256: b81b5b493b97bcb61ec162a9d72d43f0fc2463bf89575f1cc192ccdc2d213456
font_01_sfnt_off0000634e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634E 18748 bytes
SHA-256: 5efbdd91acf04ee4189407ecfbc860d70cb86f9bc4f939de663b44da789917cd

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