Malicious PDF — malware analysis report

Static analysis result for SHA-256 0652a46fd966efd3…

MALICIOUS

PDF

97.1 KB Created: 2021-06-04 13:30:32 +03:00 Authoring application: Janet Spencer (via Marilyn Robinson) First seen: 2021-06-13
MD5: 2b01cebcd3843cabe598c2bbecbf8d39 SHA-1: 48c357b95ab7682f049aaa6d5233c4c1179acf59 SHA-256: 0652a46fd966efd3a070a0451833d28a9ffd0383dce9f7395789c8db806d922a
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-based lure, a common phishing technique. It impersonates the Walmart brand and links to a suspicious domain, quokrzh.walmartnewjersey.com, likely intended to harvest credentials. No scripts were extracted, but the overall structure and URL suggest a phishing campaign.

Machine Learning

  • Nyx PDF Classifier clean score 0.0033

Heuristics 4

  • Image-only PDF lure links to a brand-impersonating host high PDF_IMAGE_LURE_BRAND_HOST_LINK
    PDF is image-heavy with little real text and its clickable action targets a host carrying the brand name 'walmart' as a domain label / subdomain segment on a registered domain that is not that brand's own and is not known-good (e.g. 'udai.walmartnewjersey.com', 'paypal-secure.net'). Unlike the homoglyph-typosquat rule, the brand here is spelled correctly but glued onto an unrelated domain — the canonical brand-impersonation phishing / scam carrier shape behind a screenshot-like lure page.
  • 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 97 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://quokrzh.walmartnewjersey.com PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13176 13404 bytes
SHA-256: 4bfdb8a1de40fcd190700df3df6aa91683a9a5fa959c8a0ea38c144429881a58
font_01_sfnt_off00015335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15335 11660 bytes
SHA-256: 3de6a1c6f5fd1c808aecc3738a958ea4e0079b833284e4072da6419eeace0f5d
font_02_sfnt_off00016cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CFD 9620 bytes
SHA-256: 8ba5f0f225208410886a0fd55614cf2137e78b6ab8d8bc1b635784ffcfe2730d

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