Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb76c1a7157b8fba…

MALICIOUS

PDF

9.5 KB Created: 2021-10-11 09:52:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 78d810d108de78f7170c4ea5cebe5b39 SHA-1: f74ac15b1e5744b0dfc5f00e1e8210a50deb06d7 SHA-256: fb76c1a7157b8fbadd5b1f0faab204695bba302df721fc679f05b22ab82b112a
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as an image-only lure, typical of phishing campaigns. It contains a single image and minimal text, with a deceptive host link pointing to 'http://yughschlereffleesslndle.updta78-serv1ce.info'. This URL is the primary indicator of malicious intent, likely serving as a landing page for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.1816

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 9 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://yughschlereffleesslndle.updta78-serv1ce.info PDF link annotation
    • http://www.microsoft.com/typography/ctfontshttp://www.fonts.comMicrosoftIn PDF document text
    • http://www.microsoft.com/typography/fonts/default.aspxIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1615 6180 bytes
SHA-256: 56a52b815ab1d3320d2b86f77abd9fd9ddb7ef0bf6f0425b132bd10f1381ab15

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