Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b7d9461c71ab9d3…

MALICIOUS

PDF

37.1 KB Created: 2020-06-06 10:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 57b46444e8c2794d9e117ed6c80adff8 SHA-1: d56c1d7768fcb71f005132f31927bd42fc2577a4 SHA-256: 4b7d9461c71ab9d3019ff9f3a1b8143421c12c01b6e0638d9cba1121564c8a79
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or SEO poisoning tactic. The document body contains a reference to 'M cheyne reading plan esv' and is generated by wkhtmltopdf, indicating it's likely a lure. The primary intent appears to be directing users to a multitude of external resources, potentially for malicious distribution or to manipulate search engine rankings.

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://premierserv.net/uploads/1/3/0/2/130291471/130291471.html#m+cheyne+reading+plan+esv PDF link annotation
    • http://burgosoil.com/uploads/1/3/2/3/132303226/domulam.pdfIn PDF document text
    • http://cpanel.kellygariepy.com/uploads/1/3/1/3/131398000/fa743440c89ad8.pdfIn PDF document text
    • http://preachersrestaurant.com/uploads/1/3/0/3/130313415/4106995.pdfIn PDF document text
    • http://eclipsestaffingsolutions.com/uploads/1/3/1/4/131406436/5867254.pdfIn PDF document text
    • http://remidavidphotographe.fr/uploads/1/3/1/3/131380322/b9d90.pdfIn PDF document text
    • http://outlawradiofm.com/uploads/1/3/1/1/131164564/baradugibu.pdfIn PDF document text
    • http://whatshottaccessories.com/uploads/1/3/0/8/130874231/fefurifo_janurape.pdfIn PDF document text
    • http://purealignmentchiro.com/uploads/1/3/0/7/130776514/9024204.pdfIn PDF document text
    • http://severedthumbsart.com/uploads/1/3/0/8/130874504/3770fc9.pdfIn PDF document text
    • http://tmandersonauthor.com/uploads/1/3/1/4/131406970/jasigofegupivut_megezip_fazizana_zofuburulawela.pdfIn PDF document text
    • http://mail.cocoabeachalehouse.com/uploads/1/3/0/7/130776754/51f716a1.pdfIn PDF document text
    • http://tinsbycare.org/uploads/1/3/0/7/130739577/1157806.pdfIn PDF document text
    • http://premierserv.net/uploads/1/3/0/2/130291471/terms.htmlIn PDF document text
    • http://premierserv.net/uploads/1/3/0/2/130291471/dmca.htmlIn PDF document text
    • http://premierserv.net/uploads/1/3/0/2/130291471/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vuputujotudu.files.wordpress.com/2020/06/busirige.pdfIn PDF document text
    • https://zixovanofodi.files.wordpress.com/2020/06/98120702318.pdfIn PDF document text
    • https://fizodudukuga.files.wordpress.com/2020/06/58961790434.pdfIn PDF document text
    • https://muzapakupuxo.files.wordpress.com/2020/06/bezugudurumavukazapud.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
    • http://scripts.sil.org/OFLIn 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_off0000639b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639B 10728 bytes
SHA-256: 3295f241f91693072f3c4d6045c1c22628fb282d55f90df0513e138d9b0cc9bb

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