Malicious PDF — malware analysis report

Static analysis result for SHA-256 e11a747f91673f07…

MALICIOUS

PDF

43.7 KB Created: 2020-04-01 14:28:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 5916b7db08f3aa6ece9883149065e441 SHA-1: 018d67089ea9b9a74c933cd7f4b2f41b60d4bcfd SHA-256: e11a747f91673f073c951d5beda4fe66e7126abf7775011070eedbea73ab47ff
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links to other PDF documents hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. No scripts were extracted from this sample, and the document body is heavily obfuscated, making it difficult to determine the exact user-facing lure. The primary attack pattern observed is the mass distribution of external links.

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://ndchair.com/uploads/1/3/1/4/131452991/131452991.html#concepto+de+forma+en+artes+visuales PDF link annotation
    • http://mywritingtour.com/uploads/1/3/0/6/130620838/sabomufeju_luvejipodozupat_dorexerudog.pdfIn PDF document text
    • http://cinderellascleaningcompany.com/uploads/1/3/1/1/131163666/8873024.pdfIn PDF document text
    • http://viewsbrand.com/uploads/1/3/0/7/130776526/7533921.pdfIn PDF document text
    • http://madlcleaning.com/uploads/1/3/0/6/130603824/7926445.pdfIn PDF document text
    • http://janecallen.com/uploads/1/3/0/6/130639954/7ca5e504.pdfIn PDF document text
    • http://cremecilla.com/uploads/1/3/0/8/130814328/5779033.pdfIn PDF document text
    • http://pielrx.org/uploads/1/3/0/6/130640229/2585529.pdfIn PDF document text
    • http://occupai.org/uploads/1/3/1/4/131438180/sigezomenezod-wifunigibidime-mumudolikuneb-ginigowakinab.pdfIn PDF document text
    • http://ibdca.com/uploads/1/3/0/7/130776212/paligapidinaj_rufizobeb_gowuxufebumutif.pdfIn PDF document text
    • http://goodfud2.com/uploads/1/3/0/8/130814063/478a9.pdfIn PDF document text
    • http://diversitonlearningacademy.com/uploads/1/3/0/5/130551692/6922678.pdfIn PDF document text
    • http://canniyeah.com/uploads/1/3/0/4/130488955/3911225.pdfIn PDF document text
    • http://royalbodiesandrepair.com/uploads/1/3/0/9/130969206/868ef74147e671.pdfIn PDF document text
    • http://davidjmcgraw.info/uploads/1/3/0/2/130287542/10e398.pdfIn PDF document text
    • http://store.rebootvb.com/uploads/1/3/0/6/130604027/ramime.pdfIn PDF document text
    • http://ecadllc.com/uploads/1/3/0/4/130475955/6844041.pdfIn PDF document text
    • http://our-little-home.com/uploads/1/3/0/3/130313107/d8c46b125950f6.pdfIn PDF document text
    • http://standathwart.com/uploads/1/3/1/1/131164076/xegexavomofuri_nibak_warelofulomiv.pdfIn PDF document text
    • http://518titanlawncare.com/uploads/1/3/0/4/130489131/d0e1f9f4a0.pdfIn PDF document text
    • http://berksdogtraining.org/uploads/1/3/0/8/130814042/nisanafutameke.pdfIn PDF document text
    • http://fjordpharmaceuticals.com/uploads/1/3/0/5/130551836/tilofug.pdfIn PDF document text
    • http://southsidecustoms.shop/uploads/1/3/0/6/130605283/buvafurojug-zenenobab-masafol.pdfIn PDF document text
    • http://wpbluebirdfestival.org/uploads/1/3/0/5/130588333/3954353.pdfIn PDF document text
    • http://prizmhaircompany.org/uploads/1/3/0/6/130620975/7fdd7.pdfIn PDF document text
    • http://peteylownotes.com/uploads/1/3/0/6/130622047/1447016.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000803d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x803D 9196 bytes
SHA-256: d34d5587b3c97d13b9b1d952fb582b5f4eaf3db992041d3b23b7dbbcb57b78b2

Open this report in the interactive analyzer, or submit your own file for analysis.