Malicious PDF — malware analysis report

Static analysis result for SHA-256 123c842c6868be8f…

MALICIOUS

PDF

42.5 KB Created: 2021-05-30 10:23:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 894508a4a1f1ca78e4d5a39d7cc98217 SHA-1: dc0e7bd20020b331ccaeca876cb3101bbd35b8f4 SHA-256: 123c842c6868be8f12cd6eeec111eefd28a650fc23b333b0c1e8a287b491d8c0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites that are disguised as generators or hacks for popular games, such as Coin Master and Roblox. These links are identified as malicious redirectors, indicating a likely phishing or scam attempt to trick users into visiting potentially harmful sites. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9742

Heuristics 4

  • 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.
  • 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/free-spins-coin-master-app-game-hack In PDF document text
    • https://altaviastagerace.it/wp-content/uploads/fsqm-files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://altaviastagerace.it/wp-content/uploads/fsqm-files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://altaviastagerace.it/wp-content/uploads/fsqm-files/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://altaviastagerace.it/wp-content/uploads/fsqm-files/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://altaviastagerace.it/wp-content/uploads/fsqm-files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://altaviastagerace.it/wp-content/uploads/fsqm-files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://altaviastagerace.it/wp-content/uploads/fsqm-files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://altaviastagerace.it/wp-content/uploads/fsqm-files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://altaviastagerace.it/wp-content/uploads/fsqm-files/how-to-get-free-skins-in-minecraft_GM479516143.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_002_off00003afe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3AFE 28832 bytes
SHA-256: 2630bac9af35177c14232ea00c92896a77004bd29351599b8f1ce6e4ff8811c4
font_01_sfnt_off00007ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE6 3204 bytes
SHA-256: 8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
font_02_sfnt_off000085e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E9 17884 bytes
SHA-256: ed1ea3c4e7635b9f65a5e0b6798c92341d7c1feababf17669f4466b6be8364ea