Malicious PDF — malware analysis report

Static analysis result for SHA-256 c65d1db1b1e98b2a…

MALICIOUS

PDF

36.3 KB Created: 2020-04-15 07:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: c2b5eb185609f37e849e8a18c13b75a1 SHA-1: 4c2d9679d897edda7e687cd0d856c224ed13237c SHA-256: c65d1db1b1e98b2a9ac3ff01d756e7df9fe221c805e26cc016e88cfcb6e3cb9f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, many of which point to PDF files on various domains, suggesting a link farm or SEO poisoning tactic. The document body mentions 'Fannin county ga arrest reports', indicating a lure to entice users to click on the embedded malicious links. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://papasroast.net/uploads/1/3/1/4/131437246/131437246.html#fannin+county+ga+arrest+reports PDF link annotation
    • http://gloriamata.com/uploads/1/3/0/4/130476144/b659b69.pdfIn PDF document text
    • http://bakehouseco.com/uploads/1/3/0/5/130550855/950fcdb73edc4b.pdfIn PDF document text
    • http://waychilljesus.org/uploads/1/3/0/9/130969139/7425255.pdfIn PDF document text
    • http://maaselectric.com/uploads/1/3/0/4/130435573/norazewo-xujemisuduxo.pdfIn PDF document text
    • http://zennorchurch.com/uploads/1/3/1/1/131164075/modajekisijoxo.pdfIn PDF document text
    • http://ns1.chicoanimalshelter.org/uploads/1/3/0/8/130874585/dc7c23690e.pdfIn 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

Related samples 3

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_off000065f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F3 7708 bytes
SHA-256: 65918aec799cd83f34540d7cf75712534d49c0e7b1934d8fbe722177f3662c9b

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