Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc033482e80b984b…

MALICIOUS

PDF

45.2 KB Created: 2020-04-23 08:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 20b16f1e5a6475d9902e7cf7cd17ebed SHA-1: eb41582e95e48231e728fa3ca3cfa79b1abd9107 SHA-256: fc033482e80b984b2a306449e26d5529e490cd36f54c9176c047ca311e32607c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links, many with numeric slugs, pointing to a network of websites. This behavior is indicative of a link farm or SEO spam technique, likely intended to direct users to malicious content or phishing pages. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://agostomiglia.com/uploads/1/3/0/6/130620439/130620439.html#information+about+indian+culture+and+tradition
    • http://sunshinesgoldenretrievers.com/uploads/1/3/1/3/131383325/mekigiretik.pdf
    • http://melodymurphyphotos.com/uploads/1/3/0/4/130483125/fosojizulexadiv-kamed-numoluripeb.pdf
    • http://fatflusher.com/uploads/1/3/0/2/130291033/xamonijinogadezesifo.pdf
    • http://emporiamarketingco.com/uploads/1/3/0/6/130604904/5565515.pdf
    • http://coffeewithfriends.ca/uploads/1/3/0/4/130489228/0ef4ee2b18.pdf
    • http://karengriffithsconnect.com/uploads/1/3/1/1/131164156/9a7525eb843.pdf
    • http://superiorhomeinspectionrepairservices.com/uploads/1/3/0/2/130272856/romuzidevipiw.pdf
    • http://tooldesignsolutions.com/uploads/1/3/0/4/130476442/roxuwemivopaja.pdf
    • http://railroadseafood.com/uploads/1/3/0/7/130739450/9425365.pdf
    • http://probusiness318.com/uploads/1/3/0/7/130776067/1214220.pdf
    • http://setreport.com/uploads/1/3/0/7/130739286/wemovobu.pdf
    • http://mtlplumber.com/uploads/1/3/0/5/130589384/de72667d3.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008aaf.bin
68e96bb6fd54e4ae85d934ad8a940ca37d30977483590a8ba01c25c80e66c8bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAF 7664 bytes

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