Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae254e18095440d8…

MALICIOUS

PDF

46.4 KB Created: 2021-05-16 22:42:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bb28b4b78073776b492b458179b047ad SHA-1: 093ad9664318c0269120ad7d2d7e6f71359f79a9 SHA-256: ae254e18095440d892929e46201a8c26fd8d1e3f5711eb719efe4fea9d3bb7c2
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to malicious redirectors, masquerading as "free generator / game hack" lures. The document body and extracted URLs suggest a scam aimed at tricking users into visiting potentially harmful websites. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic to distribute these lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/431946152/how-to-get-free-robux-without-downloading-apps-game-hack In PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/mcpe-client_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-menu_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-spins-and-coins-coin-master-app_GM406889139.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_off00004bc6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BC6 24604 bytes
SHA-256: 9beba500d1e044c9917de64cba03a322d201c801f924fca629700a4ff305fd95
font_01_sfnt_off00008440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8440 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00008df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF1 19876 bytes
SHA-256: 8da7f6a753952615a486eb6a0fdfe7794e2ad045808eb185ac8c0a25e8999c49

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