Malicious PDF — malware analysis report

Static analysis result for SHA-256 71e2abecaa51e3ad…

MALICIOUS

PDF

42.4 KB Created: 2021-05-20 16:45:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b599ce2302c1a4bf0e759b8bd40b6ccd SHA-1: 9c79d733e32571de03a2652f0d6b3aaa12d55411 SHA-256: 71e2abecaa51e3ad9a2f2e51f688f5b387e22410dab4e8220d99ff431c8e7ef7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games like Roblox. The document body also contains a prominent call to action to download the generator. The presence of these lures and the ML classification strongly suggest a phishing or social engineering attack aimed at tricking users into visiting malicious sites or downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8099

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/431946152/roblox-robux-hack-game-hack In PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/pubg-mobile-uc-xyz_GM1330123889.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f5a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F5A 25892 bytes
SHA-256: 43d2acacad800bf0517da4022f79a75ff0958fc0980ad7fbfecc56475963d208
font_01_sfnt_off00006b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8C 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off000076b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76B0 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off000083c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C1 18320 bytes
SHA-256: fa424f86a9ddd472d540fc30f07119be4b576a9306b5f7bb82c207f2bb92a2b4

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