Malicious PDF — malware analysis report

Static analysis result for SHA-256 3401239de96d50a4…

MALICIOUS

PDF

53.6 KB Created: 2020-03-29 06:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 75adcf10e33505c8727187069a0621e5 SHA-1: 80b81020033ff66a647c8aa6a3968ad10db5ade7 SHA-256: 3401239de96d50a4a3cdffcfbc02cc44c84a3c0386ee56f1bc735c950fa1a392
136 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links to external PDF files, disguised as information about real estate property titles. The heuristic 'PDF_SEO_LINK_FARM' and the ML classifier strongly indicate malicious intent, likely to distribute further malware or phishing content. The presence of embedded URLs and the overall structure suggest a spearphishing attachment used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://74-123-75-199.mgwnet.com/uploads/1/3/0/2/130270985/130270985.html#que+es+titulo+de+propiedad+inmueble
    • http://childrensworkforceconsultancy.com/uploads/1/3/0/5/130590368/2843258.pdf
    • http://vit-this.com/uploads/1/3/1/4/131406442/201545.pdf
    • http://vcdamore.com/uploads/1/3/1/0/131071188/a58757bf2.pdf
    • http://mx.grandsalinelibrary.com/uploads/1/3/0/6/130639249/vogimiwitoku.pdf
    • http://blueagavebooks.com/uploads/1/3/0/7/130738988/18121.pdf
    • http://eccami.fr/uploads/1/3/0/7/130775386/fidisimazoduvovuwa.pdf
    • http://nextlevelaffairs.com/uploads/1/3/0/3/130379741/soxofisugokezaz.pdf
    • http://theretrobusiness.com/uploads/1/3/0/3/130313388/feneluva.pdf
    • http://www.brickrealty.co.uk/uploads/1/3/0/8/130874167/witelireguv-satava-werixituxebod-bitijusemefil.pdf
    • http://santaclaritascreenprinting.com/uploads/1/3/0/5/130588477/52ab6223ae.pdf
    • http://www.thesocialloonco.com/uploads/1/3/1/0/131070867/4381528.pdf
    • http://qrapht.com/uploads/1/3/0/2/130289774/a93ba852ee.pdf
    • http://trinityenergycenter.com/uploads/1/3/0/6/130604682/cfdc4252.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_off0000a6e7.bin
220696f0c2f96193906c7f2233d7fba50655ea039d3c3e35b5ad6d30d58fc77a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6E7 8956 bytes

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