Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca92ede5e7340100…

MALICIOUS

PDF

37.5 KB Created: 2021-05-17 07:05:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9d53f5bdb7536ae89b4483b22c28e3ce SHA-1: 082d8e7c77308c1251da0af83d3cc237b88a0ad3 SHA-256: ca92ede5e73401007dae0fa53fec4b4e68588f426cd70d73a850b2f7ed607e72
170 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link that impersonates Facebook and promises game rewards, likely for credential phishing. The embedded URL points to a known malicious redirector infrastructure. While no scripts were extracted, the PDF structure and heuristics suggest an attempt to exploit users through a deceptive link.

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/coin-master-rewards-free-spins-game-hack.
  • 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-rewards-free-spins-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000354f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x354F 26352 bytes
SHA-256: 023364a6db2cb7c869c3c09bc156a1a02a31e53b3a58169f7cc4ab8bbc1818fa
font_01_sfnt_off0000715b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x715B 18224 bytes
SHA-256: e3bc9749dc9baa5e723214be821330cae5b6b7c9985655e349a80ec6d91cde9f

Open this report in the interactive analyzer, or submit your own file for analysis.