Malicious PDF — malware analysis report

Static analysis result for SHA-256 b78056cf63bd26a0…

MALICIOUS

PDF

37.6 KB Created: 2021-05-13 11:00:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 99196c31024130a55e8dadffff4910f8 SHA-1: e9b71f4a143b5355027050ff50a23ff4c897a887 SHA-256: b78056cf63bd26a09db061e3521cd988926c1566f830fd782089ec77ae88669a
138 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it is a lure for a 'game hack' or generator, and includes a link to known malicious redirector infrastructure. The document body and PDF facts confirm the presence of a call-to-action and embedded URLs, reinforcing the phishing lure. No scripts were extracted, but the primary attack vector appears to be directing the user to a malicious URL.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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 invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/minecraft-for-free-on-phone-game-hack In PDF document text
    • https://code.giftcards.comIn 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_off00003798.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3798 26520 bytes
SHA-256: e818c01a2d60b630bb8b11bb75473c718528a9fddc8fdc6b94cee7ab96a2b196
font_01_sfnt_off000072b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B1 18032 bytes
SHA-256: 03f24e9b7df13ddf2a61f787c3fe001e8b6ca75c509430b262bdd287118d54e8

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