Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf29c62ea74d394a…

MALICIOUS

PDF

8.6 KB Created: 2021-10-20 11:32:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1ac4bcb3c59c0ac12c6f2d5759f5eb71 SHA-1: e9d999ed4d1b31b4dccad267b99f73cf35af05af SHA-256: cf29c62ea74d394a2d2a3ef5e0e3eff63f16d3a750ca81421c0b7a4914943762
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a phishing lure, presenting a full-page image that conceals a clickable link. The heuristic PDF_IMAGE_LURE_DECEPTIVE_HOST_LINK indicates that the embedded URL, http://yugherchlmewmwrmedellbewfn.updta78-serv1ce.info, uses a deceptive domain name. The document's structure and the presence of this suspicious URL strongly suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5533

Heuristics 4

  • Image-only PDF lure links to a deceptive (typosquat) host high PDF_IMAGE_LURE_DECEPTIVE_HOST_LINK
    PDF is image-heavy with little real text and its clickable action targets a host that impersonates a security/service/brand word with a look-alike homoglyph substitution — a digit OR a confusable letter (e.g. 'serv1ce', 'servlce', 'upd4te', 'm1cr0s0ft') — on a domain that is not a known-good site. This is a credential-phishing / fake-update carrier shape: a screenshot-like page funnels the victim to a deceptive look-alike destination.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 2 image(s), only 0 text block(s), carries a click-outward action, and is only 8 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://yugherchlmewmwrmedellbewfn.updta78-serv1ce.info PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26 12396 bytes
SHA-256: 9651c78dad64c31681e27aaf77368dfa0aab65a72df78104afb2fc8edab34c59

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