Malicious PDF — malware analysis report

Static analysis result for SHA-256 22402aefdde25918…

MALICIOUS

PDF

34.9 KB Created: 2020-04-05 05:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fbc1d15f93f17f4ca90fcf9ec4f2ea26 SHA-1: 874572160d5420f1578e5ecbd8f9fa0c93dea165 SHA-256: 22402aefdde2591871f1a18e5be9a064cc92ceafb395c7b0fca12f94661e14be
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which point to PDF files hosted on various domains. The primary lure appears to be a link disguised as a search result for 'how many calories in a taco bell chicken soft taco supreme', which directs to a URL on cardconnectnetwork.com. This suggests a phishing or redirection scheme designed to lead users to malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://cardconnectnetwork.com/uploads/1/3/0/6/130603764/130603764.html#how+many+calories+in+a+taco+bell+chicken+soft+taco+supreme
    • http://holisticveterinaryhousecalls.com/uploads/1/3/0/5/130590525/7065909.pdf
    • http://tlcpropertymaintenancellc.com/uploads/1/3/0/4/130488741/8027166.pdf
    • http://bplusriverranch.com/uploads/1/3/0/6/130621464/6c8a124975cce.pdf
    • http://brianmarella.com/uploads/1/3/0/6/130639312/dfd8389977398cd.pdf
    • http://psychotherapy121.org/uploads/1/3/0/8/130874410/df2e6276baa6.pdf
    • http://mdstaussdesigns.com/uploads/1/3/0/6/130620587/xetino.pdf
    • http://cadecim.com/uploads/1/3/1/1/131163737/mopas.pdf
    • http://abbythomas.wedding/uploads/1/3/0/9/130969636/9716589.pdf
    • http://oidso.net/uploads/1/3/0/6/130605283/1772338.pdf
    • http://montanapurewood.com/uploads/1/3/0/7/130738673/ce79847061d88.pdf
    • http://twoklassens.com/uploads/1/3/0/5/130543870/munet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000612c.bin
eee0847634b2b79a510f5e59cc1022d64722d758e2c7c73a61f6b628721f161d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x612C 7476 bytes

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