Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc0742b6a2a78c5…

MALICIOUS

PDF

43.2 KB Created: 2021-06-03 05:42:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ed2ca4550e2e6e70941268f0b3bed44e SHA-1: baa3feaafa87f321f1d768931e7f4c1724116ac6 SHA-256: 1dc0742b6a2a78c530235c82146a73519f5812355e61fc74270ea0c6b1f94fde
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appear to be game hacks or free generators. The primary link leads to a known malicious redirector infrastructure. The document also functions as a link farm, directing users to numerous other PDF documents hosted on a repository, many of which also appear to be related to game cheats or free items. No scripts were extracted, but the overall pattern suggests a phishing or scam attempt to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/coin-master-date-and-time-hack-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-hacks-for-coin-master_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
stream_004_off00004d36.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D36 25224 bytes
SHA-256: 3d59a84cf5b9f34113e71415978f75aab906089fcee1dc6efc363e6d90442ee1
font_01_sfnt_off000085f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F0 18316 bytes
SHA-256: 7bb22083c9314811711c29236537d9b39d24df6e47e77b9ae9fc3b3f4254db81

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