Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be1aa4580616a54…

MALICIOUS

PDF

40.1 KB Created: 2021-05-20 18:35:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 69b4dc1b63d4d389d0a7aa085605c476 SHA-1: 082cdbb356f316f6d0ed7d2cb659a36816131894 SHA-256: 2be1aa4580616a54b0034359a68b8b04ae4f32d6cf02e0ab54aa6a311ff06984
200 Risk Score

Malware Insights

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

The PDF document contains multiple links to external websites, one of which is identified as a malicious redirector. The document also displays a fake CAPTCHA to trick users into interacting with these links. The primary lure appears to be related to 'free generators' or 'game hacks', suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8018

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/free-clothing-on-roblox-game-hack In PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/get-robux_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_002_off00003396.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3396 25160 bytes
SHA-256: ae816c04a834b8d373efe479b451cb1beaa17d493c33db08dd372e7746672f15
font_01_sfnt_off00006dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC6 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00007a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6D 18624 bytes
SHA-256: c8648e0e7fa589189c517af6ddfacdde337cbe9d54a122799786c2e236ce5a9b

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