Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2b857e47669692…

MALICIOUS

PDF

8.4 KB Created: 2021-10-03 11:29:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 667477cf209fba58f05d86b06331b4ec SHA-1: 2c4ac9ea11e6c69775599944e909e68bbc4794de SHA-256: 6d2b857e47669692873868260fa16fb5e047b610e40742bffeb964fa9b929921
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.001 Process Injection

The PDF file is identified as a malicious phishing lure due to its structure, containing only an image and a deceptive link. The embedded URL, http://prepmrew.updta78-serv1ce.info, is hosted on a typosquatted domain, further indicating malicious intent. The file's small size and image-only content are typical characteristics of such lures designed to trick users into clicking through to a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.1778

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 leetspeak digit substitution (e.g. 'serv1ce', 'upd4te', 'm1crosoft') 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://prepmrew.updta78-serv1ce.info PDF link annotation
    • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54 12396 bytes
SHA-256: 9651c78dad64c31681e27aaf77368dfa0aab65a72df78104afb2fc8edab34c59

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