Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bde6c1aac46f1bd…

MALICIOUS

PDF

8.2 KB Created: 2021-10-12 08:24:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c98c185fbeb63a1767e1d9c49badf148 SHA-1: f0b3bdb19281df40786c050d023f2d2747810350 SHA-256: 1bde6c1aac46f1bd236cdf4627cb7d9a30cad99aadcab16bd2533103aaec80f0
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file utilizes an image-based lure, a common tactic for phishing. It contains a single embedded URL pointing to a deceptive domain, likely intended to trick the user into visiting a malicious site. The heuristics indicate this is a typical shape for a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.

Machine Learning

  • Nyx PDF Classifier clean score 0.1666

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 1 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://yughgreemfeem.updta78-serv1ce.info PDF link annotation

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000160f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160F 2888 bytes
SHA-256: 71cf87e71fb3121624a1def6ce09df8bc0bc86564c8a9d19869994daf8135d1f

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