Malicious PDF — malware analysis report

Static analysis result for SHA-256 8005be87ba8608c1…

MALICIOUS

PDF

37.8 KB Created: 2020-06-08 07:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-10
MD5: 52503bdcc9c295888a5fe010755b0f47 SHA-1: 0eb4a3a3cc2d8add91f5df7a08c5ed6968588799 SHA-256: 8005be87ba8608c18a92a759d913dd4642773c641be48ffa7fd7a2edab0d62ef
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a deceptive title and a large number of embedded external links, many of which point to potentially malicious PDF files. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic identified a link farm pattern. While no scripts were explicitly extracted, the presence of numerous URLs suggests an attempt to redirect the user to malicious content, likely for downloading further payloads.

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://poolpatioscreenrepairorlando.com/uploads/1/3/1/3/131381204/131381204.html#a+morte+te+d%25C3%25A1+parabens+download+legendado PDF link annotation
    • http://mail.artanagallery.com/uploads/1/3/0/3/130379549/zivezadonawes-vazakoleb-jatozudilow-jaluxok.pdfIn PDF document text
    • http://mjmroofing.co.uk/uploads/1/3/0/5/130544303/5f0bf0e2b58eb58.pdfIn PDF document text
    • http://my-genuine-life.com/uploads/1/3/0/6/130620228/6aafe8e9.pdfIn PDF document text
    • http://myonlinefashionmary.com/uploads/1/3/0/8/130814070/jomikuvikar.pdfIn PDF document text
    • http://scrunchiesbycynthia.com/uploads/1/3/1/8/131871687/b266d02adaec83c.pdfIn PDF document text
    • http://healingpalate.com/uploads/1/3/0/8/130813840/fejowekawa.pdfIn PDF document text
    • http://rrbconsultingservices.com/uploads/1/3/0/5/130588461/4860583.pdfIn PDF document text
    • http://hostmaster.breadandrosespub.com/uploads/1/3/1/3/131398575/wetotuwalasido.pdfIn PDF document text
    • http://avphospitals.org/uploads/1/3/0/6/130639450/6036708.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://gekekepupofo.files.wordpress.com/2020/06/kidenorejoj.pdfIn PDF document text
    • https://gotexutag798502486.files.wordpress.com/2020/06/32164198845.pdfIn PDF document text
    • https://sajototut.files.wordpress.com/2020/06/mopenen.pdfIn PDF document text
    • https://fujipoveju.files.wordpress.com/2020/06/dagawebe.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000632b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632B 12204 bytes
SHA-256: 6d31b23ca351525a3f4d345fca7a162e91aac0d5d8ac8d1c85f3aedddc42e42b