Malicious PDF — malware analysis report

Static analysis result for SHA-256 010c398a67cbb91a…

MALICIOUS

PDF

44.7 KB Created: 2021-05-12 21:23:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ceb485876da98cfe4ac35f275955d73e SHA-1: d703baeda91388cadaed8c87d094ffaf8a6cf059 SHA-256: 010c398a67cbb91add26d083b7407d2c3bcb9f78e649d1d18ab78ed701b7c819
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that are identified as malicious redirectors and part of a link farm. The document body and heuristics indicate a lure for game hacks and free generators, which is a common social engineering tactic. The presence of numerous external links suggests an attempt to drive traffic to potentially malicious or ad-heavy sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.xyz/app/406889139/how-to-get-coin-master-free-spin-link-game-hack In PDF document text
    • http://www.apocalissedigesucristo.com/images/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/roblox-sued_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/free-robux-on-phone_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_003_off00004939.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4939 24724 bytes
SHA-256: c8d2e5dc0bac613f3393a05951ca648d4a2554bf6922dd06d03267aea18e1511
font_01_sfnt_off0000827a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827A 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C64 18220 bytes
SHA-256: b2f7f6595bf64a30853f7d52e44db90316d94cc0a70445ac6854799e3a79afd4

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