Malicious PDF — malware analysis report

Static analysis result for SHA-256 778eb7703f773af0…

MALICIOUS

PDF

49.4 KB Created: 2020-03-11 06:29:47 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7daa239b503d6267c86d10043b7accf7 SHA-1: 110783d9b1e39bd51acc12bc1208e5aa7e46d5fa SHA-256: 778eb7703f773af013f7105ff6fce84290f6a7c77af99becd3933b71ae42c9ee
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links likely serve to manipulate search engine results or redirect users to malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated.

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://ifyr6.bpmtc.com/uploads/1/3/0/5/130590168/130590168.html#after+shave+lotion+formulation+pdf
    • http://thecreativevirtualassistant.com/uploads/1/3/0/9/130969834/e7b198553d.pdf
    • http://royalscepter.com/uploads/1/3/0/6/130620469/781540.pdf
    • http://baigoftricksentertainment.com/uploads/1/3/0/4/130483350/denadedujumuxabozov.pdf
    • http://michellesellsidhomes.com/uploads/1/3/0/5/130543210/2024023.pdf
    • http://www.voterodcasey.com/uploads/1/3/0/4/130489572/9738d.pdf
    • http://dixietravel.net/uploads/1/3/0/5/130540714/b10ba934124ce7.pdf
    • http://dbtdelaware.com/uploads/1/3/0/4/130483614/kovadivesova.pdf
    • http://chantalemerchant.com/uploads/1/3/0/6/130621643/jumozog-nizagoleda-rotujodekoza.pdf
    • http://mentorjess.com/uploads/1/3/0/4/130435722/gajajowugikoliv.pdf
    • http://aulayaiqsimarugut.com/uploads/1/3/0/6/130639329/6814174.pdf
    • http://waltzerbooth.com/uploads/1/3/0/5/130545429/xadesaxoroxa-wavixozerutu.pdf
    • http://cflucktraining.com/uploads/1/3/0/2/130289523/9546317.pdf
    • http://massagejacksonvillefl.com/uploads/1/3/0/4/130488295/3392582.pdf
    • http://byondtheblank.com/uploads/1/3/0/7/130738497/ca94667164dbf1.pdf
    • http://dlkhomesllc.com/uploads/1/3/0/6/130621179/gizegok_jolibiget.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_off0000968c.bin
438088fcde3acca2b0097d5ea6be8c908a0c235c828b5d3cdad0d0d8952fce74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x968C 9088 bytes

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