Malicious PDF — malware analysis report

Static analysis result for SHA-256 0103f94becf89a3a…

MALICIOUS

PDF

41.5 KB Created: 2021-05-13 01:37:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 893e03627265d037f544973806eecd5e SHA-1: 763d00f14969ded955ef29a18421293e7031978d SHA-256: 0103f94becf89a3a6bd001468939b8292e89c5eae3e44308e3116b66f1690f57
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains multiple links to external resources, including a known malicious redirector. The document body and heuristics indicate a lure for game hacks and free in-game currency, which is a common tactic for distributing malware or conducting scams. The presence of numerous SEO-like PDF links further suggests an attempt to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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/479516143/minecraft-hacker-skin-game-hack In PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/free-roblox-com_GM431946152.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/roblox-a_GM431946152.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/coin-master-codes_GM406889139.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/minecraft-gun-games-free_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
stream_003_off00004a27.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A27 24500 bytes
SHA-256: e7ea312881f59fcfc778e6ccba7fe344085647a77d077bd509216baf038d0742
font_01_sfnt_off000081c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C1 17740 bytes
SHA-256: 91fe2762de83ff68ec278d498415159af7d0ffb5c1d0151dc7294afbb77550eb