Malicious PDF — malware analysis report

Static analysis result for SHA-256 c72273130c4bcb8f…

MALICIOUS

PDF

34.7 KB Created: 2020-05-13 15:40:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: ec17cfe4e5788a58f01a268d01bece6d SHA-1: 8090c1000a1e8f665b4d1be022c10166bb2681e0 SHA-256: c72273130c4bcb8fb13a4a907229a962178dcac3a12e333bca00328892cf9b1b
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1598.003 URL/Domain Reputation

The PDF document contains a lure for MFA or one-time code harvesting, disguised as a hotel credit card authorization form. It also exhibits a link farm heuristic, pointing to numerous external PDF files hosted on various domains. These external links are likely part of a broader phishing infrastructure designed to redirect victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://villasathamptonfinancing.com/uploads/1/3/1/4/131437375/131437375.html#3rd+party+credit+card+authorization+form+hotel PDF link annotation
    • http://buyglycoflex.com/uploads/1/3/0/2/130273987/savuzowibadugorume.pdfIn PDF document text
    • http://greekfilmbooking.com/uploads/1/3/0/6/130604715/42480f657e7c.pdfIn PDF document text
    • http://zimfarmbutchery.com/uploads/1/3/0/5/130551210/mizariku-zopudi-medovuwu-padovogura.pdfIn PDF document text
    • http://viagerplus.net/uploads/1/3/0/7/130775278/sepex-wadixawe-jetaxarazol-supawoxaf.pdfIn PDF document text
    • http://givenspta.org/uploads/1/3/0/7/130775980/2443636.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn 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_off00005c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C30 10540 bytes
SHA-256: 7df733b02dbdb24f65b5426258ebfc5aeb02cc66c7266e27a71f1ba780e74600

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