Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec32848aaee36e2…

MALICIOUS

PDF

42.9 KB Created: 2021-05-20 02:17:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e1587974633bd4fd668fb899a5b3e158 SHA-1: 0da6619690bb72039e11bc75066790a1ca85901e SHA-256: 7ec32848aaee36e23d157382acf69c80761eb42654e0ecc24a43730e1287bd4c
260 Risk Score

Malware Insights

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

This PDF document contains multiple links designed to lure users to external websites, including a known malicious redirector. The document body and heuristics indicate a social engineering tactic, likely aiming to trick users into downloading further malware or engaging in phishing activities. The presence of numerous links suggests a link farm or SEO poisoning attempt to drive traffic to malicious content.

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/free-minecraft-hacks-game-hack In PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/toolbox-mod_GM479516143.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/roblox-cheat_GM431946152.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/coin-master-free-spins-uk_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_003_off00004e38.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E38 24824 bytes
SHA-256: 28a161b16c64f53bcc56267f0dca0897b71d8c933989c2cd968b66df49471ad5
font_01_sfnt_off00008756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8756 17740 bytes
SHA-256: 02673fc9b31aa1f7767db1cd16a9f6370da751ac2c2fa3ca820772adadbcecd3