Malicious PDF — malware analysis report

Static analysis result for SHA-256 732c26b6b873ee2d…

MALICIOUS

PDF

40.0 KB Created: 2021-05-12 09:11:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 6031bc339635f91bc62cf03477bab45b SHA-1: 600127924c2adf4f0f1f761a1445a69de1cb7c58 SHA-256: 732c26b6b873ee2d8b978c4bdacef72e3a5f71d43d8db76e9da54fae4fdc0f22
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to a website offering a 'game hack' and a 'download' button, indicating a social engineering lure. The heuristic firings confirm these links point to known malicious redirector infrastructure. While no scripts were extracted, the document's structure and embedded URLs suggest it's designed to trick users into visiting a malicious site, likely to download further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/coin-master-unlimited-spin-link-game-hack In 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_off00003495.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3495 26288 bytes
SHA-256: 7a109c365e453348345f502bd4176742f94d2b97e2009b56faf9a0927352ecad
font_01_sfnt_off0000700f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x700F 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000079fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79FA 18584 bytes
SHA-256: 4b9e97571f76fbd37980e49efa03e4d0776fec80245dbf17b6cc6ba6596e58ec

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