Malicious PDF — malware analysis report

Static analysis result for SHA-256 143580c35a277306…

MALICIOUS

PDF

44.2 KB Created: 2020-04-14 22:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 0ff19fc07525cf6770d47546537e4fac SHA-1: 017c631ff240a4ab6e3b0ee7fa66a2af2c7c53e7 SHA-256: 143580c35a27730660934c8ceb23ab63ac1c05b815a16b01ed449485e2b50088
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, pointing to various domains. The document body, though heavily obfuscated, contains text suggesting it is an 'Oracle hyperion interactive reporting statement of direction', likely a lure to encourage clicks on the malicious links. No scripts were extracted, but the presence of many external links suggests a redirection or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ebooks4sale.shop/uploads/1/3/1/4/131483001/131483001.html#oracle+hyperion+interactive+reporting+statement+of+direction PDF link annotation
    • http://prettylittlethings.ca/uploads/1/3/1/6/131606293/gojavojo.pdfIn PDF document text
    • http://irpbat.com/uploads/1/3/1/4/131483266/gofokurefoja-moxekebewolis.pdfIn PDF document text
    • http://toomuchstuff.info/uploads/1/3/0/9/130969700/bonorebamimen.pdfIn PDF document text
    • http://yangxchris.com/uploads/1/3/1/3/131383943/4888965.pdfIn PDF document text
    • http://elviraabrica.com/uploads/1/3/1/4/131482996/5929136.pdfIn PDF document text
    • http://arnould-achats-consulting.com/uploads/1/3/0/6/130604030/4f84f50f261.pdfIn PDF document text
    • http://probizhr.com/uploads/1/3/0/4/130489359/89c62.pdfIn PDF document text
    • http://castlegaragepenrithltd.com/uploads/1/3/0/7/130738819/guxeroludiz_zibix.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008744.bin
2b89a01f72f49067d23e907af4a9c917039353c919f1d73dfc5568e874878353		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8744 7580 bytes

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